I picked up 2k8 yesterday morning, I didn't really play a full game, but I played until halftime.
The dunk contest is whack, so if that's a reason for you getting it imo it sucks.
I like association better this year, feels cleaner to me.
I like the fact that they added in some more stats categories, mainly hustle and vertical.
I don't agree with many of the player ratings at all, and I will be going in and changing many.
It's a lot harder to score and get inside, but that's a plus since it's more realistic.
Overall, I'd say for a true 2k basketball fan it's easily worth it. If you're just a casual player, wait for a drop.