I have the game and I actually find it to get pretty boring pretty fast. At the beggining, it's cool, but once the whole AR thing starts to get tedious and you start getting really sick of having enemies spawn back 4 seconds after you beat them with battles that drag on and on and the fact the game forces you to constantly spend hours grinding to make it to the boss, it's really old really fast.
I enjoyed it for the first 4-5 hours, but around the 10 hour make, the game overstayed it's welcome, which is a shame considering there are so few RPG's on the system, let alone ones you can pick up for under 10 bucks.