I've been here a couple times now and I simply cannot say enough about the quality of food. Their menu is immense but everything is of a very high quality.
My favorite dishes thus far are the roast duck curry and the crispy duck drunken noodles (I am a sucker for duck). We've also had great success with multiple appetizers (BBQ chicken wings were great.....odd for a Thai place, I know) and soups.
As others have said, the location is, um, interesting? Included at no charge are beggars in the parking lot. Don't let it scare you off though, the trip is beyond worth it.