I decided to install Win 7 and if it didn't work I could reinstall XP. Putting in Win 7 took care of the booting issues I was having so that is a plus. Without the Aero, it is not bad. You can tell a difference, but since I only use it on a limited basis it is no big deal. The Task Bar kind of looks "washed out" and like Boohbah said there is no Peek. Since my performance increased, I am glad I made the switch.