I just installed.
It does have some bugs. Don't believe me ? Don't care.
Stick with 10.5.X until 10.6.X
Worth the 30 bucks ? Doesn't seem to, right now. For those that have a perfectly fine system... you can afford to wait 6-12 months before an upgrade. You most likely will not notice any differences.
Oh, to those that claim Windows 7 is behind and 10.6 was released early... it shows. 10.6 should have spent another month or two in the works.
Great step towards, the not yet there, 64 bitness. So, the upgrade is really a toss-up. Wait a few months for it to mature [including 3rd party developers].
Screen from my 2006 Mac Pro :
Snow gave me 45 Geek Bench points. Well within the margin of error.