Saban's apartment was really great located, in a quiet street and a beautiful neighborhood, just 3 mins walking distance from Aya Sofya and the Blue Mosque in Sultanahmet. Also, just 10 mins walking from the Big Bazaar (Kapali Carsi) and 5 mins from the closest tram stop, where you can get T1 tram to reach the Beyoglu central district.
We only stayed for one night, so it was really time saving to be so close to those main attractions. The apartment itself was delivered to us really clean, and with everything needed provided. Saban was really kind and helpful, although the reservation was done just the day before just before midnight! So, i would surely recommend Saban's accommodation, and I will surely use it again myself next time I will visit beautiful Istanbul.