The movie had me on my seat with the right amount of action, suspense, and correct science. The movie is based on a book of the same name and the producers did an excellent job keeping the science in the movie.
There are a couple of bad science moments, but these were known by the author of the book and kept in because the author had no other good way to push the story forward. For example, the wind blowing things all over the place on the surface of Mars is incorrect science. There are wind storms on Mars, but the atmosphere is so thin that the wind would have little effect on moving objects. Radiation shielding was glossed over and little was mentioned regarding Mars' lower gravity.
Regardless of these bad science moments, the movie was filled with accurate science, and I'll say it again, was AMAZING! Watch it!