Thought I'd start a thread on the new location. I've been to the Larkin St. location many times, but never to Hayes Valley (I have peered in the windows). There is no sign yet on the restaurant at 3189 16th St; I walked right past it and then looked it up on my phone a block later. This location is maybe half the size of Larkin and more stylish, and the music is more intrusive.
I walked in for a weekday lunch, around noon; there was only one other party in the restaurant the whole time. Rather than order my favourites (which are everyone's: duck larb, crispy pork belly, nuer tod, kha moo), I decided to try the two-dish lunch special for $9.75, which I had never had. This was a mistake. The food was decent but not exceptional. Next time I will try one of the standards to see how it compares to Larkin, or one of the new dishes created for this location.