This 'hole in the wall' restaurant deserves 5+ stars. Although its kind of out of the way from central Pittsburgh, it is worth the trip. Not only is it inexpensive, but the food is phenomenal.
My family is from South India and it 100% lives up to our high standards for this type of food. The dosas are crisp and the batter authentic and delicious and the sambar is quite literally the best I've had in America. We've literally eaten here twice in one weekend because its that good, and I even know family that makes it a point to drive through Pittsburgh when traveling from distant places such as Detroit because they love this place so much.
Some other great items to order are chola bhatura and vada. The mango lassi is also on point.
The service is not always incredible, they take a little longer than average sometimes and can be a little rude on rare occasion but the food is so good that I still give it 5 stars.
One thing to be aware of that it is in a strange location and looks like shack more than a restaurant, with a long, windy road leading up to it but trust me, it's worth it.
If you're anywhere in this area or even remotely hungry/like Indian food - GO!