Considering the fact that often there is only one choice available, the cook on duty is cooking the same dish all day, every day... so we say that become good at that it's almost inevitable (unless he is really incompetent). The cons of these restaurants are the chance, not so remote, that the food is not very clean (causing stomach problems .. especially at the beginning). And the fact of being often only a couple of centimeters away from the scooters which are running on the street... watch your feet then... and be careful to the exhaust pipes.