This book is amazing. It covers so many important computations using Matlab, including probability density estimation, supervised learning, parametric/non-parametric models as well as Markov Chain Monte Carlo methods.
The negative reviews are from people who were looking for something else in this book. As it stands this is one outstanding book and one of the few books I keep permanently on my desk (I own over 200 books). Credit to the writers for the amount of detail especially in the code (no mistakes found yet).