The environment is very vibrant, the food quality is pretty high, and the staff are friendly, though not fluent in English (I witnessed some of them speaking German to an acceptable level). The price is a bit on the high side. Sitting outside, if it is not too cold and you can find an empty table is recommended. Make sure you try a couple of their mezzes, esp their Paprika-cheese wrap and Hayderi yogurt. They have a fantastic Kalepache soup. And for the main dish, if you are a group of two, and - God forbid - not vegetarian, you can try their mix Kebab (someone has put the picture of it here). It is more than enough for two people.
Not a fancy place so no dress code whatsoever.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.