upgraded to Vista

I upgraded to Vista today, and was suprised to find that my machine feels more responsive than it did under XP. Even more interesting is that under Vista, Firefox runs far better - using less memory, not crashing, etc. It even deals with PDFs far better than Firefox did under XP.

I've only used the OS for a few hours, so the novelty may wear off shortly, but I'll post back here with more notes as I get a feel for whether this is a worthwhile upgrade or mostly windows dressing.