The models are fairly good quality, low poly models which are ideally suited to usage in 3D games.
A variety of models are included, and there is enough content for most types of games, although there are too many military items, and not enough others. For example, there are no "normal guy" or "normal girl" models which you could then take and customize. Some of them are bit tacky. The tanks etc. are pretty good, as are the troop models. The only real problem is that the animation is quite dodgy for some of the models. For example, the troop's firing animation looks as if he is holding a lightweight pistol, when he is more likely to be using a rifle.
3DS versions of the models are included, so you can edit them in your own applications.
The included textures are reasonable, the skyboxes are too low resolution to be of any real use.
The browser application is a simple affair, but works well, although as it runs in fullscreen mode it isn't possible to view the browser in one window and your code in another.