The 3D aspect was just meh.
There are two kinds of movie 3D. Some movies film in 2D, and then after filming go back and create a sort of fake 3D by assigning a certain depth to each part of the image. Just out of practicality they can only provide a finite number of layers to each 3D scene, so the 3D effect is somewhat limited.
Other movies film with 3D cameras, and every single point on the screen is recorded in its precise 3D location, with effectively infinite layers of 3D in every scene.
The latter results in much more pleasing 3D.
This website lists which 3D movies are made with which technique: