I visited here today. They have a small menu at the counter, but I chose to have readily available green curry. My rice and curry were almost cold. I saw some mock meat and pointed it and the person behind the counter added some tofu and vegetarian balls.
The food was not very good. It was cheap, all this costed 35 bahts. Maybe this was a strict kind of thai jay -food place so the food was plain.
You pay with coupons that you buy from a different counter. You can return unused coupons and get you money back.Pros: very cheap
Cons: a bit tasteless food, my food was cold