I'm enjoying mine quite a bit. It's very speedy, much more so then the old Powerbook. I do have the whine others hear when it is on battery and idle, but it seems software might be able to fix this. Haven't tried under the newly released 10.4.6 yet, though I rarely notice it.

I had Windows dual booting on it the day I got mine, as the contest details came out then. I'm not doing much with it right now, but once video drivers come out, I'll use it for gaming. And once that happens, I'll also sell off the Dell brick XPS laptop.

Overall, well worth the money spent. I managed to sell the old Powerbook for $1500, so the upgrade cost came out to be around $1000. Not bad for what I got out of it.