As a Thai person (born and raised in Thailand), I can 100% vouch for their Pad krapow (minced pork with basil leaves) because they use REAL holy basil (and not the other type grown here...). I even met a Thai chef from another Thai restaurant who told me that they are the only place with the real holy basil.
However, the Pad Thai here wasn't good at all but pretty much all non-Thais were eating it so to each their own. The curry was pretty good and although I don't eat Kow-soi in general, apparently it's good, too.
Basically I only go here for pad krapow. Make sure it comes with sunny side up egg and the side of fish sauce/lime juice/chili. yum!