Purchased in 2020. Excellent signal with no disconnects from the receiver, even with the interference of a wooden desk. It can also connect via Bluetooth to devices that have it (e.g. MacBook) without occupying a USB port. The rubber wears off in the shape of the hand, but it doesn't bother me. Accurate handling due to the right weight and size. I have relatively large fingers.

An excellent mouse that only gets 3 stars...
It has many positives:
- easy switching between 3 devices
- battery life
- this awesome scroll wheel with two modes...
- ergonomic and comfortable
- it is repairable (I changed the middle button on all three I have)
The reasons it loses two stars are:
- the rubber wears out (unacceptable for a €55 mouse)
- the buttons break, especially the middle one (unacceptable for a €55 mouse)
- I would prefer it slightly larger
- it should cost €35

Positives:
- Connection with three devices
- Convenient device switching with a button on the side
- Option for silent multi-page scroll or by step
Negatives:
- The soft coating of the mouse deteriorated after 2 years, as well as the contact of the left click, resulting in the inability to drag and drop, essentially rendering the mouse useless

Purchased on 27/07/23. Nice mouse, comfortable to hold, with a good size for regular hands (palm grip). Works fine on Linux (Fedora), and with the Solaar software (https://pwr-solaar.github.io/Solaar/), which is the equivalent of Logi Options+ for Linux, it can be customized to a great extent. The free-scrolling of the wheel is excellent, and the thumb button also functions as a gesture button. The only issue might be that the wheel has some play left-right, although it currently works fine.

Amazing mouse. I have had it for 5 years and it still hasn't had any issues. The battery, I forget to change it. Convenient size and weight, precision and comfort. A bit noisy but at normal levels. A big positive is the three Bluetooth connections, it connects with a laptop, iPad, and even an iPhone! Recommended!

I got it 4 years ago. On the positive side, the battery hasn't drained yet. But what's the use when it has such excessive power saving that it permanently goes into sleep mode and takes a long time to wake up. It lags quite often. It has interruptions. It often takes 20-30 seconds to wake up. I have searched the internet to see if there is any setting, but there is no solution. Disabling the "Allow the computer to turn off this device to save power" setting in Device Manager doesn't change anything.

TLDR: STAY AWAY!

For me as a programmer, the best. It is the 2nd one. The 1st one, after years of daily and long hours of use, couldn't catch the left click of the scroll wheel that I had for copy. I got the MX MASTER 2S, which didn't satisfy me functionally, so I bought the 2nd TRIATHLON. I highly recommend it.

It does what it says. Very convenient, works perfectly on iPhone and computer for anyone who wants to screen share their mobile screen on the computer.

Positives:
- Connection with three devices
- Very convenient device switching with a button on the side

Negatives:
- The soft coating of the mouse wears off after a few months (especially if you have sweaty hands)
- Issues with the switches (specifically, the left click contact broke for me, resulting in not being able to drag and drop)

I have it for almost a year and I am very satisfied with my purchase. I have changed the battery twice (and this was with the first battery I used to be already old...) so no problem! It has a very comfortable and firm grip in the palm as I like it (medium hand size).

If something bothers me, it is that the buttons make a relatively loud click at night and it may be annoying.

The only annoying thing is that the side part where you place your thumb is a button that activates desktop items preview and it can be accidentally pressed during gaming. However, it can be disabled through the device's settings.

It has been very convenient for me, especially after using Logitech Options to assign shortcuts to its buttons (Cut/Copy/Paste, etc.), it has become an integral part of my work. It is slightly small for my hands, but I expected that when I ordered it. One year later and I haven't changed the battery yet. It is also worth noting that it doesn't seem to have any delay in response via Bluetooth, both on MacOS and Win10. I highly recommend it!

I have been using it for over a month and my hand hurts a lot. I have never had any issues with tendinitis before, nor have the hours of usage increased... My conclusion is that if the palm does not sit exactly in the right spot, a problem arises. In my case, with a hand size of L, the mouse is too small for a comfortable grip. Apart from the fact that it did not fit me, there is nothing negative. Connectivity, functions, and quality are all perfect.

After searching and reading for a very long time for the right mouse, I ended up with this one. Rejecting the magic mouse due to its size and hand application as well as the absence of a scroll wheel, I chose this one because: a) it has an excellent size and hand application, b) very good build quality, c) immediate response to commands, d) 8 buttons with various functions, and e) it can be connected to 3 different devices - important -.
For as long as I have had it, I have noticed a few brief disconnections with my macbook, and if I could add a small negative, it would be its slightly heavier weight.

Logitech warranty guarantees both in terms of build quality and usability, filling your palm and providing plenty of actions you can perform with the additional buttons it has.

Nice design and ergonomics. Connected immediately to the laptop. Good and fast movement. The programmable buttons are very convenient. The option to release the wheel for fast scrolling is also great.
I haven't tried the "flow" function yet, but it sounds amazing.

As for the negatives, the main buttons, right/left, make more noise than I expected.

I've been using it for a week and it seems like a very good choice.

Although I have read from several people that it has future issues with the scroll wheel (like many Logitech mice), so far in the short period of time that I have been using it (6 months), it is excellent and has not had any problems. Comfortable in the hand, beautiful software, it connects very well wirelessly, it is a nice-looking mouse and with the programmable buttons you can customize it to your needs, the batteries last a long time and overall it is a high-quality mouse with moderate cost. So, based on current data, I recommend it.

The best mouse I have ever used. The multi-device feature is amazing, it has adjustable friction on the mouse wheel. With 0 friction, I can scroll effortlessly through logs all day. Pressing the button at the top switches the mouse wheel back to conventional scrolling. Overall, it's a delight for working with huge Excel files, PDFs, etc. It's the best for professionals. Very comfortable for the wrist and perfectly weighted. With a good mousepad, it moves effortlessly. I hope it lasts.

It is perfect, sturdy, and has the ideal size. It is lightweight enough to carry with you to work and in general, it is very handy that you can adjust its buttons as you like. It truly deserves it.

As a construction quality, it is very satisfactory for its price. The battery lasts a long time. Personally, I prefer the fact that it takes extra batteries as usually the first thing that breaks in similar peripherals is the wheel or the battery.

The feel of the mouse and the wheel is very good and the size is ideal for me. It is a smaller mxMaster 2s without the thumb wheel and made of cheaper materials! In this particular one, it is easier to switch between connected devices, so if someone handles multiple devices, it is preferable to the mxMaster!
Although it has been worn out quite a bit, the only wear that the mouse has is on the part where the thumb and index finger rest, the matte coating has come off and it is shinier but it is only an aesthetic problem.

Also, if someone wants to handle multiple devices simultaneously, it is worth checking out the Logitech MK850 which includes the M720.

Supposedly, you are giving the (quite) extra money for a branded mouse in order to ensure comfort and durability in its use. However, when its wheel starts spinning wildly, after mild use for a period of time shorter than a year since its purchase, you realize that no one should be dazzled by the (indeed interesting) special features when it cannot meet the essential and absolutely necessary ones.

I have the mouse for 1 year. The flow sometimes doesn't respond, for me it is quite heavy and when I hold it, it doesn't give me the feeling of durability. Of course, it is very useful that it connects to 3 devices...

It is the most expensive mouse I have bought and overall I am very satisfied.
I found it very useful that it can be connected to 3 devices as I use it for both my desktop and laptop. Many adjustable keys with functions that can be adjusted through the software. I also really liked the flow function, which allows you to simply drag the cursor from one computer to another to copy and paste, although personally I don't use it that much. The fast scroll works perfectly and I actually use it more than the regular scroll.

Update: The battery lasted me less than 2 months with an average usage of 3-4 hours per day, but there were times when I left it on for hours. After just 1 year of intense use, I noticed that the material, since it is soft, starts to wear out quite a bit and gets sticky...

I had a mouse from another well-known company. It would disconnect, the buttons stopped working, the clicks wouldn't register, everything was wrong. I decided to switch and get this Logitech one. It looked really nice. As soon as I held it in my hands, I thought, wow, what a great mouse. It really was nice in terms of feel, functionality, and appearance. But after a few days, the scroll wheel started having issues. If the mouse stayed still for a few seconds, the scroll wheel wouldn't work. Not up, not down, not the middle button. It was frustrating because every time I wanted to use the scroll wheel, I had to either click or move the mouse to "unstick" it. It was like it was going into sleep mode. I replaced it with another mouse, hoping for a change, but the second one had the exact same problem. Such a troublesome mouse... Now I'm using a $10 mouse that hasn't had a single issue for five years. What can you say...

Good mouse comfortable in the hand immediate response variety of keys for multiple commands but Logi should have a good button configuration application and for Android since it switches so well to so many devices, unfortunately lately it doesn't always respond to clicks.
P.S. The 3 and not 5 go for the company not for the mouse which is indirectly affected by it

I have 3 devices in the same space and it has saved me! Great accuracy on flat surfaces... resistant to falls... it has fallen several times from the desk or the couch and it is currently working properly and hasn't disintegrated. Easy connection with the devices and no disconnections.

Awesome mouse, after the mxmaster it is the best choice. The masters are indeed better-quality but they are huge and heavy and not suitable for laptops. I consider it much better than the overpriced anywhere ones. 4 out of 5, it would be 5 if it was as high-quality as the high-end mx master and anywhere since it is one click below them in terms of materials used.