I took a friend who was visiting Bombay for a quick snack here and all I can say is it was a thoroughly deplorable experience.
We both tried the steamed mixed veg dumplings, which are pretty expensive at around 140INR for a few meagre pieces. The dumplings were tough on the outside, the veg filling was average and not one of the myriad of sauces really was a decent complement to the main show. I also feel they could at least serve the dumplings on something other than a flimsy cardboard plate.
I was also surprised that such a small place with so few customers could be so dirty. At least one could keep the few tables that are in the place, clean and tidy.
In brief, do not seriously consider Dumpling King, even for a cursory snack to pass the time.
*2016 – no longer is Dumpling King with us. Sigh of relief.