I picked it up today and I'm loving it.  I also like the combo system and the breakers.  I haven't really played much of the other modes but I did play a few games online which is an awesome feature.  The multi-tiered stages are great.  I love the death traps and the weapons in the stages.  Death traps can turn a game around too, for instance, you are getting the crap beat out of you and you are already down a round.  If you knock them into a death trap, boom, you're even now.  I think this game is great.