I purchased this game a couple of months ago, and have been able to run two one-shot scenarios and a PBP campaign since that time. The rules are excellent in that it is very simplistic. Combat is broken down into Direct Fire and Area Fire. Direct Fire means you're shooting at something you can see, and Area Fire means you're just going full auto into a designated area.
The Stress rules really help to give the characters, even NPCs, some depth to them. Not everyone can be a hero, and you're just as likely to hit the dirt when things go South. There are also rules for artillery fire, and an in-depth discussion of how a mission works for the boys of the 1st Cavalry (the PCs). The mission seeds given are great, though I haven't run any myself.
My only problem is that in the PBP campaign I ran, getting the true 'feel' of terror in the jungle didn't cross over as well. In my opinion, it's something that could cross over a lot better in a face-to-face game, letting the spur of the moment and real 'in-the-room' tension get to your players.
All in all, a fantastic title for those looking for a gritty Vietnam-era tabletop game. I'd highly recommend it.