One of the best Thai place to eat. If you are going for lunch then try to go there before 11:30 or you will end up by waiting outside.
No need to mention the spicy level, may be you will become the fire breathing dragon after eating the Thai spicy (number 5). if that is not sufficient then they have some special hot sauces ready for you on the table. you can try that sauces too.
Besides the hot thing, all curries have some special aroma and it's worth to give them a try.
Giving 4 star just because, once my friend ordered the shrimp fried rice and shrimp was kind of under cooked.