Over the past year, I have been using this mouse almost constantly, with occasional changes to try out other mice, but I always end up coming back to this one.
I have seen many truly amazing mice come out on the market, and I own several of them.
Unlike in the past, the market is now a continuous battle of innovation for all companies (I'm not talking about you, Corsair). It is very difficult to stand out anymore.
In the last 2 or maybe 3 years, Razer has made a complete 360-degree turn with their products (not all of them, of course), offering true innovation in their category and bringing features that were once only for enthusiasts to the mainstream market.
For a while, the popular Logitech G Pro Wireless was at the top of the wireless mouse category. Even with Logitech's latest entry (G PRO X Superlight), the Razer Viper Ultimate continues to offer more at a lower cost. I will compare them later.
The Viper Ultimate comes with a brand new sensor without any issues with acceleration, spin-off, compatibility problems with mousepads, and adjustable lift-off distance. It also has optical switches, avoiding double-click issues while having the lowest latency and a battery life of 70 hours. It weighs only 74 grams, has 100% PTFE mouse feet (I will explain more later), and even has a Speedflex (like Paracord) charging cable so you don't have any resistance during your gaming session when you need to continue playing while charging the mouse. Finally, it comes with a charging dock, which is incredibly positive in my opinion because besides solving your problem, it looks beautiful and stylish while charging.
Razer definitely did not compromise, so it's no surprise that many people are excited about this product. The only issue most people face is that after a few months, the dock doesn't charge the mouse right away and you have to take it out/put it back, shake it, etc. If you are experiencing this issue, try cleaning the contacts with a damp cloth, that's what fixed mine and from what I've seen, it has worked for many others on the internet as well.
If I were to change anything about this mouse, it would be to have the Razer Deathadder V2 Pro's clicks, which are the second-generation optical switches. Functionally, nothing changes, I just prefer how they sound.
The wireless technology in this mouse is very fast, and personally, as even "Pro Players" have mentioned, I don't feel like I'm playing wirelessly. The times when wireless mice were inferior to wired ones are now a thing of the past.
If you have the Razer Viper or Razer Viper 8K and want to switch to the Ultimate because you like the shape and want wireless, just get a Bungee (like the Razer Bungee). Does it make it wireless? No... but it makes it feel like wireless! You don't lose much freedom from wireless, but you gain a lot compared to before.
The mouse is also ambidextrous, with buttons on both sides. Don't see it as a negative that you might make missclicks, it's not in a position where your fingers rest. Of course, you can always disable the buttons that you will never use. If your hand is medium-sized, the mouse will suit you for all grips. If it is large, Claw or Fingertip Grip (and Palm if you hold it very far forward). If your hand is small, perhaps the Razer Viper Mini is the solution for you (and it's MUCH cheaper).
The Mousefeet are among the best on the market. Most mice that claim to have "100% PTFE" feet are usually very thin and instead of gliding, they scratch the mousepad. I decided to try the Tiger Arc 2 Mousefeet for my Viper and I can say that I don't notice a significant difference. However, on other mice like the G Pro Wireless, there was a huge difference. (the difference is due to the very poor feet of the G Pro)
BUT at first, the feet of the Viper were not as smooth, but after a day or two of use, they were perfect. I guess they need some use to wear down a bit? I don't know the details. So if you just get the mouse, it's not exactly what you wanted, give it a little time.
Something I don't know how to answer is how durable the mouse is. One year later, I haven't experienced any cracking or creaking sounds in the plastic, it doesn't feel fragile, and it hasn't broken. So I assume it's durable? I generally don't abuse the mouse :P
The price, considering the market, is not excessive, especially now. When it was released, it was priced at €180, which obviously I don't see a reason to spend that much money, but now it has changed quite a bit. It is definitely much more expensive than a wired mouse, but in order for a product to become even 1% more advanced than its competition, it costs a lot in research and development. So maybe it's reasonable? So it's questionable if it's worth the money, but definitely not something you throw away. It is an excellent product, just like the G PRO X Superlight, you pay extra for something that sets it apart from the market. So the buyer will judge if they prefer the Wireless over the Wired for the extra money.
The only "cheap" and well-known wireless mouse is the Glorious Model O Wireless, which over time, Reddit has been filled with reports of problems that often were not resolved or consumers didn't want to go through the process of contacting their infamous support. Is it worth the risk to save some money? I don't know.
If someone is torn between the G Pro X Superlight and this one, personally I would choose the Viper Ultimate. The almost glossy plastic of the G Pro X makes my hand sweat, the clicks don't have a smooth sound across the entire surface, and many times I hear something like a "double click" on the Click switch (it doesn't translate to Double Click on the PC, but there is a delay in its response, so when I need to spam clicks depending on where I have my finger, it becomes an issue). The charging cable is terrible and makes it difficult to use the mouse while charging, and finally, in the past, the G Pro, like many Logitech mice, was known for having a Double Clicking problem.
Apart from that, it is a good mouse. Excellent wireless, excellent sensor, without any significant issues during use. I wish it came with a base...
Lastly, when purchasing from stores with the "Authorized Reseller" badge, you are covered by a 2-year warranty from the official Greek distributor, and even after the warranty period, there is support and service to assist you. I mention this because it might be a selling point for some.