Authentic for sure, here is what I ordered
Khao Sai - Beef- just okay, the noodles were kinda hard, but not in a good way, the beef was TOO rich, not my style. The sauce was salty and you could taste the shrimp.
Pad thai - wonderful! if you're here get it but don't go out of your way for it
Green curry chicken, very authentic - reminded me of the green curry we would eat on the beach in thailand but again most places get this right.
the lineup to get int was a good 45 minutes, the drinks are expensive.
I probably won't be going back and if I do i'll stick to the pad thai.