While this is quite a chunky book, there aren't that many pages. However, this is pretty normal for pop-up books. The scenes that there are pop out pretty well (a couple needed prodding in a couple of places to pop out first time, but after that they were fine), and the artwork is detailed without trying to be ultra-realistic.
The big selling point of the book are the sound effects - they're much better than you get with, say, a noisy birthday card, and my son liked all of the sounds, doing his best to imitate them.
It's a little louder than I expected, but in a good way - it's not too loud, but you're not going to miss it.
All in all, it's a little limited (hence the lost star), but it definitely entertained my son, and after all, this is aimed at young boys not adults (however immature), so I'll go with his seemingly high opinion of it.