I'm using the Vista Home Premium on my T61 that came from Lenovo and it's actually pretty nice so far. It uses a decent amount of disk space due to a lot of preinstalls, but most of it is stuff you'd want anyway - acrobat reader, some client security apps from lenovo, etc. Nothing intrusive or spammy that I've seen. Vista isn't too bad either, but then again I got 2GB of memory and a 7200rpm drive so that might be tempering my opinion of Vista. I installed Office 2007 and OneNote and I'm pretty happy with where it's at.