I have the entire EK books but I only ended up using Orgo book. For Gen chem, Bio, and Physics book, I gave up using their books after two weeks.
However, it seems like EK books have the highest ratings, so it may be just my learning style. I like when materials are presented in conventional way and taught that way. Some of the topics in EK books are presented in somewhat random order and are not really explained in conventional way. They are also very condensed (hence the review book). So if you need to re-learn the material, this book may not be ideal.
You can read the first 2-3 lectures and see if you can follow. You can also go to a bookstore and look at a couple of other prep books. This was what I did and I should have done it earlier instead of wasting two weeks of my time.
Good luck.