Three Good things about this game:
Stadium graphics and fans (fully animated, even to the point as some are walking around in outfield bleachers)
Commentary (Joe Morgan and John Miller provide the best baseball commentary ever in a video game)
World Baseball Classic (fun game, even if the rosters and rules aren't 100% correct)
Three Bad things about this game:
Gameplay (It's just terrible. I know some people may enjoy it, I don't. I generally play MVP because the gameplay feels 'connected to what you see on the screen. In MLB2K6, you feel as if you have to anticipate what button to hit before it's time to hit it. Really screws with timing on hitting and on fielding. Baserunning is beyond disconnected.)
Facial likeness (Hardly any of the players are close to the facial likeness of the players they should be. MVP last year on the XBOX looked better as far as facial features. 2k should be ashamed of themselves. As for player models, ridiculous. They tried to simulate cloth and ended up with what looks like fat rolls in the middle of every players uniform. They're arms and legs move but the upper body doesn't. Just really awkward. )
Animations (Throwin, Running, hitting, pitching. Not close on 'signature stuff' and you've got outfielders 'short arming' throws from the outfield fence all the way to home plate. Of course, they throw it hard but the animation is that of a flick. I tried turning a double play from a short stop moving towards second base. He loaded up on the throw to the second baseman standing 5 feet away. Obviously couldn't turn it.)
I spent about 6 hours playing it today. It's fun in some parts, annoying in others. Some stuff is really better than other baseball games of years past, but alot of that is outweighed by gameplay and animations.
It's not worth the $60. But, if you REALLY need a MLB game for the 360 and don't mind the things I said above, go for it.