No, TBR has two General Chemistry books in one set. Each has five sections, each with 100 problems in passages in addition to the review. So for $50+shipping you are getting about 1000 practice problems which I think are more reflective of the actual MCAT compared to TPR science workbook, for instance.
Their Physics books are similar as well. I can't really speak for Biology or Organic Chemistry though. But if you do a search on the forums on TBR, you'll find that most people who've used it think its one of the best resources for PS.