If you walk in and see it's busy, or there is a large group dining, go somewhere else if you have time restraints. Service is usually ok, but when there's large groups or it gets a little busy, it gets a little rough.
I come during my lunch hour, and it's usually a decent place. The lunch special is a good deal and the food is decent as is the portion size for the price. It's nothing stellar or out of the ordinary, but it is still tasty and an easy choice for the usual Thai fare if you need a quick bite and like to sit down.
The restaurant is very decorated, clean and comfortable.
Overall it's a decent choice in the area. There are, of course other choices nearby if it looks too busy.