If you like movies that will make you think, this is absolutely one of the good ones. I always liked David Lynch and Cronenberg. They have always made high-quality movies.
Iain Softley has directed K-PAX brilliantly. The movie tears in feelings and philosophy of the mind and world. Kevin Spacey and Jeff Bridges both delivers superb acting skills. It caught me, I did not take my eyes away from the screen during the movie. On the other hand, if you are hoping for a special effect sci-fi movie, this is not for you. The story is being dragged a bit, which can be a bit boring, but also works as a way of building up the theme of the movie.
Enjoy this film, I did..