As a Mexican used to eat spicy food I must warn you, the medium spicy was strong, it made me sweat and order a cold tea. Can't imagine how the toughest level is.
The place gave me the impression of being in a fast food Indian franchise. Although the jars full of spices gave a nice touch of authenticity, the set up, the containers, and the fact that they just offer Rotis put in my mind that Rotis might be the Indian burrito.
The Roti I ordered was ok, it tasted like spicy spinach with potatoes. I couldn't taste any other spice.
On the other hand, the bite I had of the lamb vindaloo was fantastic. Loved all those tangy flavours and the consistency. I would recommend it.
I also liked the masala fries, crunchy and creamy in the inside.
It's a good place if you are in a hurry.