Whoo hoo! A cross-over game that doesn't have Capcom's hands on it!

I've only played this game about five times, but I must say that it's one of the best fighters I've played in a while (save KOF XI). The gameplay is smooth, the backgrounds are brilliantly designed, there's a wide variety of characters to choose from and it's addictive as hell!

What do you think of this game (for those who've played)?