Love this restaurant and feel compelled to visit it when I am in the neighborhood. Khalid the owner is very personable and I like the fact that he shares his Kabul heritage if you care to ask.
The food obviously is cooked from scratch. So, be very patient, because it is well worth the wait -- especially because the prices are so extremely reasonable. It is not really "fast food," it truly is a home-cooked meal with quality ingredients.
Addendum, updated 06/03/2012:
I went there again today and once again the food was simply amazing! The care that is taken to cook AFTER it is ordered. Everything is made like your Great Aunt would do it if, of course, she was from Kabul, Afghanistan and if she was following cherished family recipes and if she were using only the finest ingredients. Just taste the rice and you will know what I mean. Then try any of the expertly spiced and prepared meats. You will be hooked.
Khalid was not there this afternoon but Tommie was and he was just as gracious.
I go to Kabob Express when I want a great meal for an incredible price and when I want to impress a friends or family. It truly is a bonus that the prices are so low.