I just installed this onto a old cheap laptop that came with vista home premium ..
1.6ghz celeronM and 1.5gb of ram
It struggled to run vista alot of the time, so I switched to xp. Now with windows 7 it feels as fast as a recent (2months old) clean xp install!
And! I didnt have to fish for any drivers (unlike xp) everything works perfect right away.
And! I can use the transparent themes and all the bells and whistles without lag.
I am very impressed
ps i love this new interface