My roommate and I ended up playing and beating this game over the course of 7 hours, and it probably would have been quicker if it had been easier to bend. For some reason, it was very difficult for our wiimotes to understand that we wanted to bend. Most of the game was pretty fun, except for a few levels - like the timed one with the giant owl spirit that we played about fifty times because of said bending issue, and I am definitely buying Into the Inferno. Also, the two-player aspect really makes the game. There are times when it's better to play with one person, like when you're sneaking past the guards into the Bei Fong estate, but it's really much better with another.
The other annoyance is the angle at which the game is played is sometimes difficult - sometimes you can't see what is in front of you, which is annoying. But I would definitely buy this game.