I have to say, this food wasn't entirely to my taste. But others rave about the food, and I don't believe in panning food just because it's not my cup of tea. So I'll say: for me, too much chilli, and overall just too fast-food-y.
But! If you like incredibly cheaply priced, decent Persian and Afghan food, and you want to know what everyone else seems to rave about, try 4 seasons... and then explain it to me!