Dinosaur Planet seems like a fascinating setting. I haven't gotten the main book yet but the information in the Broncosaurus Rex: Dinosaurs That Never Were makes me interested in more.

The opening chapter is about the Storm Valley. It is a distinct area in the Dinosaur Planet setting that contains these unusual dinosaurs. It has some mysteries to it that have obvious potential for adventures. The area is under continual storm clouds but it allows light through. The storms make aerial travel dangerous. The valley dinosaurs are even more intelligent those of other valleys. The Confederate and Union are kinda setup in reverse rolls where the Union is trying to use dinosaurs and the Confederate have more technology. They have a set of plot hooks after the history of the valley but I kinda prefer the hints of possibilities in the valley's history.

Dinosaur Planet was made for 3rd edition not 3.5. On top of this the authors have chosen to do some things differently than standard 3rd edition. You could still use the creatures without too much trouble in 3.5. The descriptions of the dinosaurs are very interesting. I do find that some pictures aren't as good a match as I would like. The ankylosaurus peltaspinos picture doesn't have a club like tail and ends up looking similar to the spinoflagella peloros. Similar problem exists with the craspedoceratops gregarium where the picture doesn't seem that different from the multiceratops tarbos. The description (and stats) of the craspedoceratops gregarium explain that the frill should be larger and go back to protect the sides as well as the front. I was surprised there isn't a poison spitter in the monsters.

I'm not currently running Dinosaur Planet or even 3.5. I actually purchased the book with the intention of using the creatures in a 4th edition game. The pictures will work well as visual aid and the tactics of the creatures can give ideas for 4th edition power. Still it has convinced to put the rest of the Dinosaur Planet products on my wishlist.