Yes this is a dosa specialty restaurant/hole in the wall - will get to it in a bit.
BUT wonderful yelpers you have to try the channa bhatura it is quite good, a solid 8/10.
As for the dosa they are good and for the price cannot go wrong. Definitely worth trying at least once!
Service - 3/5
Food - 4/5
Ambience - 3/5
Authenticity - 4.5/5
Dont mind the service just wave down the staff if you need something.
Also I have tried some of their non-vegetarian dishes/curries and they are okay. Would recommend sticking with the dosa. Enjoy!