Not really sure what people expect for $7 - the food is quite good, and they give you refills of side dishes. Yes I agree the service can be curt, but if the server is rolling her eyes at you, don't look.
Their pork bone soup is one of the better ones. And this restaurant gives a lot of side dishes, which are quite good.
They also have bento box specials weekdays for lunch, which are good value also.