Serkan (the host) was incredibly helpful throughout the stay, helping with check-in even though it was well after midnight. Even though we didn't speak the same language, he was always responsive and made the stay totally hassle-free.
The flat is spacious, simple, but has everything in it. A cosy living room, a soft bed, a clean bathroom, and fully-stocked kitchen. The water heater is a little noisy, but it can always be turned off at night time.
Kadıköy has to be the greatest area to stay Istanbul. For anyone coming from a more "pampered" background/country, steady yourself: this isn't Kansas! Hectic, alive, sometimes grubby..but hidden within its rugged exterior is a warm, safe and vibrant heart. Live like a local, I dare you, and you'll never regret it.