We had an extremely pleasant stay in Ali's apartment. Ali was so kind to receive us late at night at the apartment, and I have never had such a helpful host before - he showed us the apartment, gave us recommendations of the area and was always available on the phone whenever we had any questions.
The apartment is as on the photos and very nice and spacious. The bed is comfortable and the kitchen and shower works fine. Even without aircondition, the apartment does not get warm even when reaching 35 degrees outside - this was also a big plus.
The area is also very well located, close to shops and the Galata Tower. The street itself is quiet, which is nice when in need of a good night's sleep :-)
All in all, this is very recommendable, and I definitely hope to return another time.