Rating:  - Useful and practical techniques for designing web solution
Concepts of Presentation, Business and Integration Tiers are nowadays so popular among all technical designs in framework and web architecture levels, upon the promotion of diversity of responsibilities, low coupling and high cohesion between each layers. This book would be the 'bible' of mastering such technology before ongoing development. Nevertheless, it's useful for implementing projects using any skillsets, even not related to Java. (e.g. C++, PHP).
Rating:  - Great book, but a bit outdated
No doubt it's a great book and everybody can learn a whole lot from it. However, considering recent modern lightweight approaches (without EJBs) to J2EE application development, it feels a bit outdated regarding practical implementations of the patterns. You may as well check the Spring Framework for more up to date flavors.
Rating: - MUST-HAVE J2EE book
This is a MUST-HAVE book every J2EE architect/developer should have on his/her desk. Using the patterns and strategies in this book will make your applications more robust, make you more productive, and make your code easier to understand and maintain. Anyone designing, architecting, or coding with J2EE will find this book to be extremely useful.
I had been reading several J2EE books detailing examples but none of them help and guide in terms of choosing right strategy in real-world implementation. This book is not theorical, no, it offers lots of experience, tips and definitions that can convert you to a true j2EE Expert. Work with bigger J2EE applications without doubts because this book will help you to carry out them.
Rating: - perfect for concept clerification.. quick ref or ... comparision
this book is best in three ways
it has quick referances for all methods
detail comparision between methods and
detail discription of each method.
perfect book for any java developer bigginer or pro.
Rating: - Provides solid foundation for layering and interfaces
This is a great book for providing the foundations and beginnings for which you should approach projects. The book's main purpose is to re-inforce rules/guidelines for encapsulating the tiers of an application. The most important concept to take away from this book is: encapsulate complex api's and container dependant code in their specific tier and expose input/output from these tiers using basic api's. This allows you to loosely couple the tiers (good for maintenance) and at the same time reduce security risks by not exposing business logic where you don't need to.
Now for some critiques...A lot of the pattern examples are not fleshed out. In some cases even the code that is provided has mistakes in it; however, the patterns are right-on and that is what this book is all about. So, don't take the syntax of the example-code provided too literally. Some of the Presentation Tier content is obsolete given advances in IDEs which generate a good deal of the patterns described for you (but still good to know why/how things are done even if they're automated). I found the chapters covering the Business Tier and Integration Tiers to be most valuable.
All-in-all this is a valuable read and reference for app. developers.
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