We spent the amazing 10 days in Serkan's apartment. The place is located in a most central neighbourhood of Kadikoy: only 2 minutes by foot from the Bull statue, surrounded by plenty of bars, cafes and shops.
In the apartment there are all the essentials available. Serkan is very welcoming and supportive host, he supported us a lot and provided best recommendations of places to visit. Next time in Istanbul we'll definitely stay here :) My highest recommendations!