This document is simply amazing. It is simple wirtten. Although the arguments are very hard in difficult to explain and to understand the author was able to explain in clear words and in a comprehensive way everything that is related to SOA. Nothing is left out. The best point is the author explains the problems, issues and features based on his own experience and provides tips on how to solve your own daily problems. Sometimes and I need to read a book more than 2 times to really remember and understand all the topics. The way the content is presented and mentioned again in other sessions makes you always in touch with what was said before and you finish with having a full understanding of the subject. Compliments!