It's surprisingly good! I went into it expecting some kind of Zelda-em-up, but it's just an arcade button masher that's insanely fun to play. I'll be picking it up but not just yet.
My only complain is since it's published by Nintendo this won't get cheaper.
Btw. did you play Alien Islation Dagless? Would like to know your opinion - I think it should be GOTY!