Solid snake,
I used that book with practice tests and it was horrific. Do not waste your money. The questions are not comparable to the real test, and even worse: many mistakes in the solutions, so you'll learn the material wrong
In contrast to the Flowers and Silvers Practice Tests book, I did like and use the Flowers and Silvers MCAT Book (the big fat one). It is great for review. Stay away from the Practice Test book though.