I've had mixed grills here and they were very good, but what sets this place apart (and please…read moredon't confuse it with Gazi Antep, which is on the same block) are both the döner kebab and something most westerners never think of trying, the işkembe çorbası, also known as 'panzensuppe' or tripe soup.
A brief word on the döner kebab (which I get in the dürüm döner form, where the bread wrap is thin like a flour tortilla): for some reason, it is, for me, the most consistently satisfying rendering of the classic German version of the classic Turkish kebab sandwich. The combination of meats and veggies and flavorings has always been perfectly balanced.
But now for the something remarkable, the işkembe çorbası. Everywhere else I've had it, and I do mean everywhere, there is far less meat, and the flavor tends to be way more dishwater. The işkembe here is loaded with both substance and flavor. You can get it with garlic, which means a spoonful of a garlic sauce, and then add red pepper flakes ('urfa biber'). You can also indulge in free veggies (like onions and whole peppers) on the side. Not only is it the best işkembe çorbası you can find, but this is one of the most delicious and satisfying soups you'll ever experience.
Köz Antep is on a nice, leafy, out of the way street; it is close to the 'Dom' fun fair; it is a bit of a walk from public transportation (S-St. Pauli, or the Reeperbahn), but for me that walk whets the appetite something enormous.