A very enjoyable film, which is sadly marred by mediocre 3D.
Similar to Thor, the 3D is more of an after thought and created post-production. Although it works better for the Captain it's not the best 3D presentation. There are some truly lovely scenes, the snow covered, train scene is wonderful and watching the characters zipline into the distance is excellent as are the final set of scenes which build to the final showdown. But, sadly, a few scenes suffer from lack of depth, the Hydra factory feels flat and on a few occasions I wasn't sure if I was watching a 3D film.
People do "pop" out of the screen, usually after receiving a healthy dose of vibranium to the face, which always raises a smile.
All in all it's a fun 3D film with some good set pieces, but overall poor use of depth makes it fall short of being a must-have.