As opposed to the location on Fontaine Avenue (which is owned by a different family), the Thai '99 on Route 29 offers great service with friendly staff. To add to that, their food is tremendously delicious, and served promptly after ordering. I always order either the drunken noodles or the pad thai, and am never disappointed. Their tofu curry dishes are also very delicious.
The ambiance in this location is significantly better than the house setting for the Fontaine location. However, I suppose there is something comforting and charming about eating in a converted house.