My stay at Kaya's place was amazing. from Day 1 Kaya went above and beyond to make sure my stay was comfortable and I had everything that was required. Kaya even helped with things that were completely unrelated to the apartment like when he went with me to the hospital after I fell in the Gym.
As for the apartment, it's very spacious and comfortable, it's quiet both during the day and night. The location is amazing as it's close to everything, Ferries, Buses, supermarkets, Bars, the sea. I honestly doubt there is a better location than this in Istanbul.