I have seen this place grow up in front of my eyes: a few years ago, when the store was a small run down shack to the new, much larger (yet still relatively run down :) location. P.s being run down is a sign of good food in Pakistan, so fear not!
They are known for their bun kababs. The bun is pan fried to perfection, the kabab has the right amount of meat and flavor. Add some home made chutney and spicy ketchup and the resulting product is sheer awesomeness.
To this, throw in the run down-ness of the store, the shalwaar kameez wearing aunties, the Hindi movies/songs playing in the background and a bottle of Pakola and it's as if you have teleported to Karachi just to have a meal.
And to boot, the prices are very reasonable.
Only negative: no credit/debit cards accepted so bring cash.