On the corner of Berry & N. 6th where there have been a string of mostly not very successful Indian places. Now, does the 'hood need another Thai place? (The space being worked on on Bedford between N.6th & 5th is supposed to be yet another) Not really, BUT, I think this one is pretty good. Ate there last night -- it's groovy looking without being as groovy as Sea (though they do have a little reflection pool, underlit, with floating flowers) it's much smaller and more quiet than the others. The chef is the sister, she has some French fusion cooking experience as well as Thai, and her brother, the architect who designed the space, is DJ'ing and hosting. When they get their liquor license (they've been approved but now just have to wait) he'll be the bartender too. (You find out a lot when youre sitting at the empty bar waiting for your mate)
We had Chai Home Style Peanut Dumplings as an app (choice of chicken or veg, we had veg) that were REALLY good. Four on a plate, no ubiquitous dipping sauce, which was just fine. A nice rice wrapper, very flavorful filling, well seasoned, peanut flavor not overwhelming, $4. Then we had chicken Massaman curry $7, very rich & flavorful; pork Kapow (with basil, garlic & chili) which was spicy without being over the top, and very "clean" tasting, $7. And had to try their Pad Thai which only comes with shrimp, $7 and was also very good.
I know theres plenty of Williamsburg Thai debate, but I would definitely go back here over Sea or Planeat Thai and try some more of the things that seems special to their menu, such as those dumplings. The brother told me that right now theyre getting a lot of overflow from those other 2 restaurants because people dont want to wait an hour or more and as of yet theres no wait at Chai check it out before there is.