Cleans the windows well, not the edges very well. If the windows are very dirty, you need to clean the cloth frequently. It goes without saying that the glass should not have any stickers, etc

After conducting research, I ended up with this specific machine. I have a professional space with many inaccessible windows, so an automatic solution had to be found.
This particular device does exactly what it promises. I didn't expect it to do such a good job. It suctions and doesn't fall. You also put the special liquid in the container for it to spray on its own. I had very dirty windows and I helped by spraying liquid directly on the glass as much as I could. Sometimes it may leave some marks or some on the edges of the windows. But that's for the perfectionists. It saves you time and effort. You place it from window to window and forget about it in between.
If the windows are very dirty, you simply put it for 2 cycles to clean or start over from the beginning.
Sometimes it may get stuck in corners and block. With the remote control function, you can move it from your phone. It is very easy and functional.

Unbelievable tool! Suction cup on the glass is amazing! Cleans exceptionally - if the windows are very dirty, just rinse the cloth and repeat the process. I live on a floor without a balcony and the windows were impossible to clean. I was saved. Expensive, but worth the money!