The 3D effects were incredible that towards the end you don't even realize you are in 3D anymore as it is just a natural feel to the movie.
Do yourselfe a favor and see this in 3D and sit close to the screen. I have seen it twice and sitting further back does not do the movie justice. If you sit up close so you only see the screen and not the rest of the theatre you will recognize and really love the 3D effects as they seemed more real and easier to lose yourself in the world that was created.
The plot could have been better but I thought the story flowed nicely. Definitely recommend it.