I went into this expecting light trash reading and was surprised to get a really cool and well-written military thriller instead. You can feel the dankness of the jungle in every scene, and the recruitment of the team members is a pretty fun sequence: most of the characters are distinct, though a few of them are too generic to keep from mixing up. The action scenes are brief, but it's easy to tell what's going on and they don't go into "horror movie" territory with the violence like a lot of men's adventure fiction titles. It's light fun reading, and certainly nothing literary, but it kept me turning the page to see what happened next.
I could've probably done with fewer team members to make the protagonists more memorable and fleshed out. They're all antiheroes, but if one of them got injured I still found myself hoping he'd pull through. The villains could have used a LOT more characterization: they're basically throwaway characters consisting of a few name-drops, a couple sentences of page time, and a lackluster death. Heiss is the only one who's remotely memorable, but I did get a kick out of what happened to him in the end.
Still, if all of the SOBs books are written as well as this one, I wouldn't complain too much. Most adventure fiction is pretty disposable, but I kept this one to read again on a rainy day, and I recommend it to aspiring writers who favor the military thriller genre.