Pretty happy with XP, but want to try out Vista on my home PC. Not sure how it will run, it's an old P4 with a 2.4g cpu, but it's got 2gb ram. If it runs like a dog or much slower than XP, I'll just reformat it and stick with XP. I've got Vista running OK on my work laptop, but I've seen it running pretty slowly on other people's PCs.