Whatever you thought of the movie (I thought it was over-hyped and devolved too quickly into endless, mindless action but had some good ideas, good bits and good production design), if you like Hans Zimmer's music this is a must-have album.
Though themes and riffs are definitely reused, it's rarely over done and there's enough variation to keep things interesting. Some of the tracks that accompany the many, many action scenes have a wonderful sense of energy, threat and desperation about them ('If You Love These People' which is the theme to the main punch up between Zod and Kal).
Particular highlights are 'Flight' (which hits the tone, the sense of freedom and power and general joy of the scene in question perfectly) and 'What Are You Going To Do When You Are Not Saving The World?', which is essentially an extended version of the beautiful track 'An Ideal of Hope' that played over the main trailer for the film.
Definitely recommended if you like any of Hans Zimmer's other music. Watch out for the weird 'uh-oh' sound effect about fifteen seconds into the track Oil Rig though...