There was another thread talking about this game already... but since I am too lazy to find it...
I said I wasn't going to buy the game, but Target had buy 2 get 1 free so I caved. I put 2 hours into the game so far and not really anything has happened. At this point I am not the most impressed, I don't think it controls that well. For example, when you try to talk to someone in town, my guy kept running past the NPC and I had to run in a circle for 30 seconds to get in the right spot.
Also, to play co-op locally you need to have a 3DS and an extra copy of the game. The fact there isn't split screen co-op is a bummer... but they should've at least given it 2 player co-op for one on TV and one on the gamepad. If $40 Sonic Racing (great game) can pull that off, this game should be able to as well.
I will put more time into the game, because it is the large monster hunts later that are supposed to be thrilling. However, right now I am a bit disappointed.