A friend and myself spent four nights in Istanbul at one of Saban's properties. It was not possible for us to stay at the room we originally booked, but Saban gave us the opportunity to chose between three others, and we ended up less than 5 minutes from the Blue Mosque. The room was good - spacious but fairly basic. The building we were in was quite noisy (thin walls, not bad quests or a loud neighbourhood). The wifi wasn't great, but did the job. The room was cleaned while we were there, however, which was great.
As we were only really in the room to sleep and in the morning, the amenities suited us fine, and Saban always responded very quickly, which was very helpful.