I own the book, and use a lot of what is in it. I was a slight bit disappointed with the results, but not a lot. I tend to use the exercises, especially the ones using the stick in place of a barbell, in conjunction with light freeweights.
If you are looking to build stable strength, it is a good workout IMO. If you are wanting to be cut like Wong, it'll take a while.
Have fun, and happy training!
Solve et Coagula ~ The Alchemical Process