It's not my favorite Mario game, but it's pretty good.
The gameplay is pretty good, and simplifying it was a good thing, since if they had kept the gameplay of games like Super Mario 64, they would have made the game even easier.
Its graphics are beautiful for a game released in the first year of the 3DS.
The levels are well designed, but they are too easy.
In general that is a problem, its difficulty, which becomes very easy when you have already beaten the game.

Good game overall, and very enjoyable.