Having been cleaned in a conventional way my difficult window (all floor level to achieve part bay window and some only with telescopic arm from the balcony) with normal squeegees, I came from a friend on the Kärcher. What can I say, I love this part! Even difficult windows let in a third of the time cleaning, the result is hammermäßig streak-free, only briefly with a microfibre cloth tighten the lower edges of the window, ready. Even the matching telescopic arm is finally quality wobbles there and flexes nothing and allows you to work properly, both in cross-attitude, as well as overhead. Having already worked with the predecessor model WV 50, one can say compared to the WV 2 is significantly quieter, the battery lasts longer and the seals are tight. Since dröppelt nothing more. So Window cleaning makes really fun again. When you get out what angle you need to keep the Kärcher what happens very quickly, you really conceded very good results, can also bristling of the most intense sunlight without any stripes. Really great and full 5 stars!