I installed it on my MSI Wind on Friday. Installation went smoothly. It picked up all my hardware straight away - no need to install any drivers. Memory footprint at boot is about 600MB, compared to around 450MB on my XP setup on the same machine. It's generally fast and responsive, but occasionally there's a pause before it responds to opening an application or changing between windows. Zone Alarm Free wouldn't install, but I can live with that. Running a video call in Skype revealed some incompatibilities with my RealTek HD Audio drivers - microphone detection was unreliable. I downloaded and installed the latest drivers; this seems to have fixed the problem. Overall, I'm enjoying Windows 7, and I'd strongly recommend it.