well ive tried all 3 of them, round tracker was on my comp for all of a couple of days, george is good but once compared to window cleaning pro doesnt come near, id say window cleaning pro all the way, it does all you could ever need and the back up from Ian the designer is 2nd too none, if you ever have any probs he is a phone call or email away and responds very quickly, also if there is anything that the programme needs you can suggest it and ian will do his best to add it to a future update.
Chris