I would thoroughly recommend this apartment and our great host.
We arrived having done almost no research on Istanbul and Mahmud had a map of the local area and metro card ready for us. He suggested a few places to visit and was around if we needed anything over the weekend.
The apartment had 3 doubles and 1 single - and they ALL had en-suites. It would suit friends, couples or families travelling because with the en-suites we all found we had the private personal space you would want from a hotel room, with the added living room.
The view was amazing and you are about at 2 minute walk from the Aya Sophia/Blue Mosque/Cistern. Great area. Next to the Four Seasons!!!
Its a small kitchen, but most of our eating was done out and about, and Mahmud did leave us goodies for breakfast etc.
Only noise was the call to prayer, but you hear that where you stay and it is part of the atmospheric difference of being somewhere different from our home town. Great value and having an apartment so central made our holiday.