I finished the 1st book. They are missing a bit of content from their physiology stuff, I also think I just breezed by the digestive system way too quick. Their immune system and endocrine system isn't covered in full as well. EK Bio has a much better overview of it, especially with colorful pics. However, Ek Bio has too little questions. When studying, you should always have your content outline out and fill in the material that is missing. mcat-review.org has outlines with some good depth of detail.
However, I think TBR passages especially the ones dealing with experiments are great. Again, there's always the "trivia" type questions. But really most of the trivia type questions can be figured out from the passages or with sufficient Bio knowledge, so I really say stick with it at least for the questions. And don't do the whole ch Qs in one go, do a 3rd and then as you move along do another 3rd and so on. You don't have to follow the SN2ed way of doing another 3rd after a week, I suggest getting a bit ahead and going back for the 2nd/3rd.