I took my wife and oldest son last week and we saw it in 3D.
This was the second time my son saw the movie...
the first time he saw it in 2D.
Awesome movie, we really liked it, however my son preferred it in 2D.
This was his first 3D movie though. He said it felt like he had tunnel vision but I think he is nuts....I thought the 3D effects were incredible.
Definetely a must see movie....and I recommend the 3D.