I would really like to stress how bad and inconsistent the netcode in the 360 version is: I have had slowdown in random spots during the match, not just the second round. The kicker? Sometimes there are matches where it is perfect...WTF? Otherwise, I agree with Jeff - the game's Persona hook is pretty awesome.
Also, surprise - people are really good at this game already. If you are going for the "win an online match" achievement, do it now while people are still learning before you are locked out forever!