I came in right when they opened. There was quite a line before they opened, and even once we got in it took a bit for us to get any sort of service.
I ordered the Gaprao Gai. They really don't mess around with their heat level. Be careful! The dish itself was very tasty, and once the lunch rush calmed down service was wonderful (and constant enough to get my water filled up often).
All in all, tasty food, good service. If you are in the area it is worth a shot. Otherwise there are better Thai places around the valley (Chanpen comes to mind...).