This is the oldest Thai place in downtown San Mateo, a sign outside says it has been there since 1990. However, it's mostly always empty when I go in. The food is respectable, but I feel it is overpriced for what you are getting, and that there are better places to go for Thai food. It's clean though, and you don't have to deal with a long wait, noise or lack of privacy. It's worth visiting, but it's not a place I recommend highly either.