Four stars... perhaps _at least_ three, but definitely more than just two stars. I've heard worse soundtracks than this one rewarded with more stars. Ofcourse everything is highly personal, but I'm quite sure that if you like Presumed Innocent that you're likely to like this score.
Yes, there's a maintheme that gets repeated, and the whole score is based on this single theme..
It's still an enjoyable score with a huge dream/relax-factor.. if you like to daydream, this score's highly recommended.