Thai is one of my favourite cuisine and Pai has become one of my favourite restaurants as well. I have been here for dinner and have ordered lunch from them a couple of times.
I love their curry dishes the most. I ordered chicken and beef before and have been very happy with my choices. I also tried their pad thai and although it was good, I cannot say that it was out of the ordinary from other places so I would go back to their curry choices.
My only complaints is the service, be it at the restaurant or delivery. Although they are friendly, service is quite slow. One time they missed a dish when my office ordered from them. Their lunch menu is also much more limited than their dinner menu.