I took my Prof here, because he wanted to have Persian food. I hesitated a lot because of the comments, but finally surrendered because it was the closest to his place and I didn't have a car. It was a weekday, and at noon there were quite a lot of people eating there (more than 10 tables taken, while the restaurant is in a residential area).
Unlike some have mentioned, the staff were quite nice, just that they didn't speak Persian! My Prof asked for Tahdig (fried/carbonized rice from the bottom of the rice casserole), which is not served normally, but they kindly served it for us on the side...
The food was nothing out of ordinary. For one thing the chicken I ordered was rather dry. We also ordered the lamb shank which was OK. The eggplant paste was below ordinary and rather tasteless. I haven't tried other main dishes, though. I give it three stars because I really liked their Salad and their Aash (kind of a thick soup).