It cleans well only if the glass is already quite clean, otherwise it collects dirt and leaves residue... still, it's better than doing it by hand but you have to sit on top of it and be careful. If you clean the glass, turn it on and spray it with a helper spray, it does the job.

ordered mainly for the purpose to clean windows from outside and it is doing this job great. Just when using should keep in mind that pads should not be very wet while cleaning so as not to leave the stains.
Used also for cleaning the walls in the bathroom which was done perfectly. It's real help at home if you have a lot of glossy surfaces.
Only one minus - noisy, but otherwise it would not be able to hold on the surface.

It is truly the housewife's helper. It cleans windows, tiles while you can focus on other tasks. It is very helpful for high windows