I found this book extraordinarily useful. Sydow is a master at breaking down complex concepts into digestible pieces. His step by step examples are easy to follow and he has the uncanny ability to anticipate the reader's question and then provide a clear, helpful answer. The only drawback to the book is that the code for the examples is not provided on a CD. I looked for a reference to a website where the code might be found, but couldn't find one. Aside from this minor drawback, this is a wonderful and extremely useful book.