The extension is a great idea. Our windows are almost 4 meters high, so I'm about so or so happy, because I still can not make it up the ladder to the upper window edge. But unfortunately it is so rigid then in extra time that you can not but ultimately all corners without contort itself, and even then you will not make it :-( Perhaps a joint would like the Swiffer, but a bit difficult to move in the movement continues help, then it would be 5 * ;-)
