I have 7 on my new computer and am very happy with it. I haven't really messed with any of the "cool" features or anything, but it seems to be stable and much quicker loading than Vista or XP. Of course it could also be the new computer that is just faster and is so far uncluttered with extra stuff. Either way, in my job I come in contact with quite a few folks who have new computers (I sell cell phones and wireless aircards). I have yet to hear anything bad from anyone about 7. It was certainly different with Vista, people were howling from the get go about that. 7 actually has lower speed and memory requirements than Vista did. Seems pretty solid so far.
BTW, lovin' the new computer. Rockin a Quad-core with 6 gigs of RAM and a 24" monitor....with spinners!!! LOL