"Apache Struts 2" is like two books in one. The first part is a 200 page book on Struts. The second part is a 150 page series of essays on related technologies and good practices in web application development.
If you've read my previous reviews of Packt books, you'll know I tend to like their shorter books better. This book kept the attributes of a short book that I like since it's like the book was only 200 pages. The longest code example was 1.5 pages and even that length was rare. There were the collection of typos I've seen in most Packt books though which unfortunately precludes a higher rating.
The first/main part covers Struts 2 clearly and succinctly. It is fast moving, includes gotchas/tips and provides opportunities for further exploration. I particularly liked the discussion of tradeoffs with techniques when it comes to maintenance. There are notes for Struts 1 developers.
Overall, I did learn Struts 2 from the book and was entertained throughout.