I had the opportunity to try out both locations of Ambala in a span of 2 days. The cooking is consistent at both places - Westwood (Friday) and Artesia (Saturday). Phagwara Bakra (Goat), Tava Bakra, Chilli Cheese - all come with Naans.
The Westwood location has delivery service. That is an added plus, given that it does not have any parking spots close by.