The gold standard... from a med student.
This is the best intro review book for your first board exams. Le has a great, succinct review of the material that has great mnemonics. I highly recommend getting this early during your training, and using it in conjuction with your course notes. It is very helpful for review for exams, as professors are in touch with current board questions to set you up for success. Also, in the back is a great rating/ranking of other study resources based on system. It gives a fair (and very accurate!) description of other helpful titles to help you do well on the USMLE.

If you are a med student, allopathic or osteopathic, GET THIS BOOK! You won't be sorry.

The definition of high yield.
I am actually going to medical school soon and I decided to begin outlining what I need to do the ace the Step 1. This is not a book to simply skim or page through. Every piece of information in this book (sans the intro) seems to be a requirement for the Step 1. I think it would be an excellent foundation to build on.

Even though I am not in school yet, I found the text quite accessible and relatively easy to understand.

Needs correction
I recently entered a USMLE forum and found out that the book has some errors.... and I got from the forum the official correction link.... I'll have to take the test first to rate the book. As for the delivery time....amazon rocks!

Highly recommended!
I used this book in my step 1 studying and found it an extremely detailed and valuable resource.I recommend reading it over and over after you have gone over the reference books ie.Kaplan once.I initially did not want to get the book because of initial negative reviews, but once I started using it to study, It was something else...It pulls together high yield information in a concise and organized manner and I cant tell you how much I appreciated it after my exam especially as I had a great score three weeks later:) To get the best out of it you have to pay attention to little details....its not a summary book for nothing so if you gloss over it you probably will not get the best out of it.

Pretty good but with some errors
This is a good review but it was full of errors. At least there is an online resource listing the errors and corrections. It took about 2 hours to make all the changes, but it was worth it. Good resource, I just wish there were not so many errors.