It's very cozy and small but in my opinion it's the best Thai restaurant in Tokyo. It's very popular because it's cheap and close to the trendy Cat Street. If you want a break from Japanese food, I would definitely recommend you this place. If the queue is moving too slowly, try "chao chao bamboo", a second site of this restaurant.
The food is excellent . Most dishes range between 500-900yen. Portions are large .
Try: pad Thai , gapao, green curry, tom yam kung noodles