Being raised in a Persian family, I can say I have eaten my fair share of good Persian food.
I have eaten at Flame Kabob on a number of occasions, and although it has been passable at times, my last experience with the food was terrible.
The rice is totally bland. Although it has a rich yellow color that should give the impression that Saffron was used, I am convinced it was clearly just food coloring.
I ordered 4 meals, and had every type of meat available for koobideh. The Lamb was dry and gritty, the chicken was distasteful, and the beef was also very dry.
I also had the Chelo Kabob, which is typically made from tenderloin. Although I would not expect it to use that cut of meat at a fast food style restaurant. That plate still cost 20 bucks and I am pretty confident they used chuck or top round.
Persian food is meant to be very tasty. It seems to me they are cutting corners and still charging a premium. I would hope there food quality goes back up.