I've got V-Mania's and they're great. They'ye easy to install or take out and store. V-Manias the way to go IMO!
As far as the power windows, I was talking to a new Gateway VCA member who had them and he was NOT happy with them. He felt he spent alot of money, but still had some of the same problems as with the peg in windows (SERIOUS water leaks). He said "They're NOT worth the money!". I looked over the installation and it just didn't have a quality (factory) look to it, kind of a cobbled look. Poor fit and finish, but that's just my opinion (his too).