This place has my favorite food in the Phoenix area. And, if you like grilled meats, hummus and rice you will love it, too.
Disclaimer: I'm not a connoisseur of the depth of traditional Persian foods - I'm just a regular girl who loves her meats, veggies and rice.
If it's your first time I HAVE to recommend you try the Barg - beef or chicken, they are both amazing. The meats are tender and full of flavor. The hummus here is one of my very favorites and the dipping bread they make on-site is perfect - even whole grain recently. As for the rice, if you like tartness (think cranberries with a twist) I recommend upgrading your rice on the dish to the Zereshk - it's amazing. The little red spice they offer on the table (Sumac) has a very slight lemon flavor and accents both the meat and the rice wonderfully. I also sometimes order the koobideh - think meatloaf with lots of flavor. I've not liked that in many Persian places but here is it very good.
The only hazard I have for you is that the portions are huge, so plan to have leftovers. Highly recommended!