Despite tough competition from similar restaurants on state street, Husnu's is probably the best Mediterranean option. I went for the first time last week, and was very impressed with both the service and the food.
We sat on the outdoor patio which was pleasant in the last days of summer and they started us off right with a basket of deliciously warm bread and dipping oil. The bread wasn't anything special, but it did have some kind of mild spice that gave it some flavor and made it quite filling. Both my girlfriend and I also had soup, so by the time the meal came out we were almost completely full (my only mistake here).
The meals themselves were generous and well-rounded. We tried the kabobs with rice and the chicken couscous, both of which were extremely tasty. The couscous was perfectly cooked and well combo'd with the sauce from the slow cooker (or whatever they used to make the food so tender).
Our waitress was polite and talkative, albeit a little slow at bringing out drink refills, but it was a nice night on state so we weren't really too bothered by it. My only other gripe would be that the prices were a bit much, but you certainly got a good deal of food and there were a lot of menu options that sounded enticing. I've had better Mediterranean food in other cities, but for Madison this is one of the better stops.