I did on May 3rd, in IMAX 3D. It was a good movie, but nothing like the first Iron Man, in regards to the story. I feel like the first Iron Man is a classic compared to the other two, mainly because of the story line. He's captured, rises from captivity with world changing technology made from a box of scraps.
Iron Man 3 had amazing CGI compared to the first Iron Man, and the new suits Tony Stark had were incredible to see in the movie - he perfected the suit. Overall, a good movie. It was amazing to see in 3D...