I got a Groupon gifted to me for Dervish and was pretty excited to try it out. Unfortunately, when we got there, they were inexplicably closed. Everything indicated that they should be open... but nope. Closed. Total waste of time.
A few weeks later we tried again (after calling ahead to make sure our drive wouldn't be wasted again). The waiter was great, very friendly but also didn't interrupt us when we were clearly in the middle of a conversation which I really appreciated.
The food was very good, but it wasn't really that special in my opinion. We had a lamb shank special, it was nicely flavored and very tender. Also had chicken kebab, again it was good but didn't blow me away. I was surprised that we didn't get any bread or something to go with all the sauce.
Generally I would rate it as over-priced. For an appetizer, two entrees, and a bottle of wine, including tip and excluding the $20 off for the Groupon our bill was $80. And neither of us were full.