I've got it here on my office computer and I'm loving it! There are many large changes that are really cool (graphically and otherwise), but there are also so many little changes that make things so much easier to accomplish.
One example is when using windows explorer. If you drill down into an area on your hard drive an realize you want to go to another area, there is a little drop down arrow up at the top where you can instanly access the prior directories. Very cool feature that I've used quite a bit in the last 2 weeks since I installed Vista.
The sidebar thing is cool - and will be cooler once more gadgets are created.
Graphically there are loads of enhancements - with the aero glass dealio and the little enhancements, the OS itself looks really cool.
As far as performance, it seems to run a bit faster than XP did before on the same machine. I'm normally not an early adopter, but I loaded it up and am really, really liking it. I give it a thumbs up.
