You can watch it online at Crackle (via veoh) or from Daily Motion:
Roger Ebert says,
There may be possibilities here, but they're lost in the extraordinary boredom of a long third act devoted almost entirely to loud, pointless and repetitive action.
Variety says, "dry storytelling and boy's-toys mechanics will stop this from being the next "Spirited Away"-style crossover hit." The New York Times calls it "a preposterous but engrossing spectacle". AnimeNewsNetwork calls it "an instant classic, something to be loved and remembered by audiences of every shape and size." There's a fan page at Facebook.