My friend Nancy and I went to see the movie Monsters vs. Aliens in 3D. We had a great time and enjoyed the movie. The movie was actually better than I expected It was well paced and the movie did not have parts where it dragged. The characterization was good and meshed will with the plot and story. The 3D worked very well; this is not the old red and blue 3D but a different technology that gives a reasonably good experience. The 3D glasses were comfortable enough that after a while you forgot you were wearing them and the 3D effect worked well. I had previously seen the movie Coraline with the same 3D technology and I think it is going to be successful particularly for animation.
My recommendation is to see Monsters vs. Aliens in 3D.