We just spent a week at Alaturka Hotel i Instanbul. We were four friends travelling together and chose a family room. The room was located on the bottom floor, behind reception. The room was big and comfortable with one bathroom and one toilet. This hotel gets a high rating because of the fantastic staff. After a few days we really felt at home! Staff was kind, helpful and spoke good english.
If I were to rate the facilities, I would say that the restaurant and breakfast was not that good, though it provided a spectacular view of the Marmara sea, Sultan Ahmet and Hagia Sophia.
Wifi was free, but somewhat shaky. The hotel provides airport transfer for a fee, wich we used. Easiest way to get from Atatürk.
What I really missed was a safe deposit box in the room. But since the room was located behind reception and because of the attentive staff, we had no reason to worry about our stuff.