Just picked it up on the Xbox on Demand 75% off sale. For $5, it fixes every major problem reviewers had with it. The reviews basically complain it's more of the same for $60, and if it were a cheap XBLA title, it would be way better. Well, now it is. Game size is only about 388mb, too.
It's also chock full of unintentional humor, like the robot announcer and the bomber girl excessive jiggle physics (in a bomberman game? REALLY?). At $5, I don't regret picking this up at all.