Very good and affordable machine! I used it on smooth surfaces like ceilings and walls, and it was excellent!!

For the money, it's okay. You can find spare parts at the neighborhood paint store, no need for special ones.

It broke very quickly, within a month, and because I couldn't wait, I took it for service by myself.

First day of use and I was amazed. I am an amateur and I bought it because of the positive reviews and because the equivalent sander from a well-known German supermarket chain broke after three days of use (the screw connecting the sander to the handle broke). For the record, the other one cost 70 euros and would jump around like crazy with the slightest irregularity on the wall. So forget about sanding with that...while the other one works perfectly. I am an amateur and the wall became flawless. Of course, unfortunately, I bought the Einhell for 175 euros due to an urgent need...but I don't regret it. I regretted dealing with the other one for 70 euros. The triangular foot is very useful. I will come back when I sand plastered walls and wooden floors.

I have been using it professionally for almost 1 year. It is a good tool, but only for walls as you have the ability to support the weight on the wall. For ceilings, it is very tiring because you have to bear all the weight since the motor is located on the top part. If you want a fatigue-free sander for ceilings, it is better to prefer those that have the motor in the handle and the motion is transmitted through gears. Otherwise, it is a decent tool

For its price, it is a very good machine. I use it for plasterboards along with the company's vacuum cleaner, and it does a great job. Without the vacuum cleaner, you won't be able to see anything in front of you.

Convenient in hand and comfortable to use. I think the head has a small issue as it eats up the protectors and the sandpaper needs to be placed exactly in the middle to avoid touching. Maybe the protective ring could be a bit bigger to avoid this issue.

A very good tool for big companies.

I don't regret buying it at all.

The only problem is that I can't find sandpaper that fits the holes of the machine in local stores

I was thinking of getting it without the delta, but it turns out that the stock and other imperfections are often in corners or close by.. Overall, though, it's worth it. Sanding that used to take an hour now takes just a few minutes and much better results. There is a big difference compared to doing it by hand. If you have a large house with many cracks, it's worth it.
Of course, it's impossible to sand such large surfaces, let alone the paint, by hand. It requires a little practice and caution, and I consider a vacuum cleaner necessary since it picks up a lot of dust.