Written in dignity. Very satisfied. I love all these automatic assistants. Too bad it doesn't wash frames. Different pros: Performs the stated function. Great helper for window cleaning. Especially good for large frames on the loggia. Satisfied with the purchase. I'm on the 7th floor. I didn’t wash the loggia for two years and finally. True, I had to run it three times with a change of rags. But, if you use it more than once every two years, but for example a couple of times a year, I think everything will go much faster. It's April and my windows are clean! Got cons: He does not go to the window himself and does not wash the frames. I would like it to be like a robot vacuum cleaner for the floor: he went himself, he washed himself, he returned to charge. Dream.