Between this and its competition (at least, on the 360), Mutant Storm, I think I'd hafta give the nod to Mutant Storm.
Oh hell yeah! Mutant Storm is 10x the game Geometry Wars is. Hell.. maybe 100x
It's ludicrously difficult in some regards (multiplyers/belts are FAR too difficult to build up and maintain, IMO), but whatever -- the base game is just brilliant. I love that old-school 'memorise the level' feel it has.
Definitely worth checking out the demo for anyone who hasn't already.
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It may be that one day a young man will adore a Pinata.
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I'm not even angry. I'm being so sincere right now, even though you broke my heart and killed me.