Had an amazing time staying in Alper’s house. The location is right in the heart of Kadikoy with every amenity you might need within a 3 minute walk. Despite the amazing location I found myself never wanting to leave the apartment because of the incredible terrace and the views it offered (can’t get much better than bosphorous sunsets over the Aya Sophia). The apartment had every single amenity you could need for a long stay (coffee machines, washing machines, PlayStation for Netflix access and fast internet service). Everything was absolutely perfect for me. Do note however that as you are right in the city center there can be some noise at nights but for the most part I felt like I was in a quiet oasis in the Midst of the chaos of the city. Also worth noting that there are two half flights of stairs in addition to the elevator - noteworthy only in the case of needing disabled access.
Overall loved my stay and already looking forward to staying if it’s available on my next trip to Istanbul. Can not recommend enough!