I had this for a month before I used it to clean the tiles in the bathroom and all of the windows in the house as well as the glass on the balcony. Great thing. If you don't dig it for four or more hours, it will come out clean, but it won't wash perfectly. But it saves time. After tying it, sprinkling it, turning it on, hooking it up, and starting it, that was all there was to it; then I went and drank some tea. One drawback is that the spray does not function properly outside, that it sprays air but that the wind carries it away so that it does not reach the window, and that you have to switch off the spray supply each time before you start using it so that you do not waste it in this manner. If it could remember where it was, that would be really cool. If the window is at the bottom and the robot constantly stops at the bottom, all you have to do is click the up button on the remote control, and it will rise, making it simple for you to remove it from the window. My wife and I are overjoyed because we found out about such a robot from fixies, and we promptly purchased it. We do not have any regrets about our purchase. Fire! I would suggest.