I live close to this joint, 2 mins walk, I am a regular at this place when I get the pangs to go dhaba style!
The food quality is excellent, SUPER TASTY AND FRESH ALWAYS! have never eaten better punjabi food any place else. They have chinese and other stuff to, but thats not what I go there for.
The service is decent, the ambience however is more like that off a Bar & Restaurant types, its a cool place to go with your friends, and family. They have the normal seating, then the family AC room and the back area with cots and pillows so you can kick your shoes of and relax while waiting for your order to arrive.
If you are looking to go for a dinner with your girlfriend, this is not the place that would impress her too much, its just not that kind of a place you know what I mean? I mean its not that the there is bad crowd or other annoying and embarassing things, its just that there is no hint of a romantic touch to the ambience of this place. If you are just going for the food...GO right ahead!
So give it a shot, this place is really famous for its food, office crowd from as far as sakinaka and mahakali make trips for a group lunch and stuff like that, only because of its food quality.