I enjoyed it. I really liked the old simple formula and it's still here [the last version I'd played was Tounement Edition for SNES]. They've added a few things, like being able to spin or do a cross-over while on offense; I didn't quite figure out the best way to utilize these, but I assume they are to dodge the defender's swiping arms or shoves. Also, you can do allez-oop dunks, which is pretty sweet. My friend and I were laughing a lot at what the announcer had to say, and at the over-the-top dunks. There's also a menu somewhere that tells you how to unlock all (or most of?) the retro NBA characters such as Larry Bird and Magic Johnson. It didn't list any other hidden characters, like (I don't know how to black out spoilers... but, politicians and actors, etc.) so I'm not sure how that works out, but I liked having that list. The unlocks are things like "make 10 blocks in one game" or "beat all 30 NBA teams with a team from the Eastern Conference".
Negative things: I played with the classic controller... clearly, the developer assumed few people would want to play with the classic controller and didn't put much effort into making it feel like the right choice. The controls are NOT customizable, which would have been nice. (For some reason, the L trigger does turbo and the R trigger does... nothing?) The classic controller controls work fine once you know what does what, but here's what really makes me mad: Menu controls. When you select a team/teammates, it says "PRESS A TO SELECT" or something like that. Except, A on the classic controller cancels and B on the classic controller selects. Once again, not a problem once you know... but shouldn't they have realized that's VERY non-intuitive. Also, the loading screens will say things like "Press C to [perform function]" and the classic controller has no C button. Not a very helpful tip...
There's a tutorial mode that teaches how to play with a nunchuck/wiimote (which unlocks something, perhaps Big Head Mode). Once my thumb heals up more, I'm going to try it out and see how the "motion controls" work. Despite my complaints, I'm betting that classic controls will remain the best option.