Readable! Excellent intro. On the inside covers, nice quick reference. As a web developer with no UML experience looking for a clearer way to pre-visualize my projects, this book got me going fast and offered perspective on best usage of the UML. The author's experience-driven opinions helped me learn faster. The book is honest about itself in that it admits it doesn't try to offer rare details of the UML that you'll rarely use. It keeps to what you'll use MOST of the time. It delivered 100% of what I was looking for. If you're already using the UML, I still think this is a great read for you.