I'm not sure what separates great Thai food from the rest of it. As a frequent traveler to the city, I've had half a dozen or so take-outs from this place, and all are really good. The atmosphere is not inspiring, and there is nothing unusual about the menu. But it tastes fresh and flavorful.
My only detriment is that I wish they would ask you for a spice level when you order. It comes out a little mild, maybe a 2 of 5, but I like it spicier.