I bought a Bushmaster rifle from him, Bob is a good guy, his FFL transfer price (TO HIM) is damn reasonable, but hes a 'kitchen table' dealer. I lived in NC at the time, so I went and picked up the rifle in person, works out of his home/car lot/business. Had a nice set of jigglers for me to use though when I locked my dumb self out of my van when I picked up the rifle :D
He orders the weapon from wholesalers and either ships it to your FFL or has it available for pickup. Make sure you want what you order, because there isnt any backing out. Just as the site says, they are not 'touchy feely,' and they keep NO STOCK on hand, other than the occasional few special units.
Overall, it was a good experince, and I would most certainly use him again. Just be prepared to send the weapon to the manufacturer (AS YOU WELL SHOULD) if any warranty issues pop up with the weapon.
Edit: Brainfarted :P