No, the full-lengths that come with that book are much more difficult than the real exam. The passages were longer and harder than any of the AAMCs. I took 3 of them and never finished on time and never broke a 30, whereas my scores on the AAMCs averaged a 35. Don't bother with the Cracking the MCAT exams, they'll only serve to discourage you.
However, the book is pretty good at covering many of the topics on the exam, so if anything, get the book for a study aid, but I would not recommend buying it for the 4 full-length exams that it comes with.