I had lunch here with my wife. It was our first experience dining in the Chungking Mansions. We ordered:
2 Vegetable Samosas, Mutton Rogan Josh, Chicken Vindaloo, rice, and Garlic Naan. Plus some beer and a mango lassi. I've heard that some of the restaurants in the Mansions are byob, but this one apparently isn't. Good for us, because we didn't bring any beer.
The pappadoms were tasty and came with this white sauce. I had no idea what the sauce was, but it was great, and I put it on my samosas too. 8/10
The samosas were small, but I liked that fact. I usually can't eat much of my meal when the appetizer portions are huge. They were really good, but needed some mint chutney or something to balance the flavor. 7/10
Equally good was the Naan. It was thick and bready, not too cooked, nicely chewy, great for sopping up sauce, greasy like it should be but not too greasy. 8/10
I had the Chicken Vindaloo and I asked for it "very spicy". It was decently spicy, but not "very". Maybe if I weren't white, they'd have given me serious spice. There was a handful of pieces of chicken and a few potato chunks. Not alot, but I'm not a huge eater. The chicken was tender but not fall-apart tender; the potatoes likewise were cooked enough, but not as tender as they could be. The curry itself was uniform in texture, not chunky. And although it was hot like vindaloo should be, there wasn't much of a vinegar flavor. 6/10
I didn't have much of my wife's Rogan Josh. It was similar in its texturelessness, and the medium tenderness of the mutton. And it wasn't very spicy. 5/10?
My wife gave the mango lassi a 7/10. You can tell how good the beer I had was by going to the store, buying a bottle of Kingfisher, and drinking it.
Overall the place seemed more British Indian than Indian Indian, and served mostly the basic British Curry House selections (though I've never been to Britain). If you're looking for authentic, this is probably not the place, but if you're looking for good and cheap, I give it a 6/10.