The location is perfect. It's 5 min walk to Kadıköy ferries. The host Murat is very helpful, he answered my messages very quickly and tried to solve everything I asked for as soon as he could. The place is cozy. However, one thing I want to point out - in time of heavy rain the roof was leaking in few places.
The neighbourhood is quite noisy so do not expect the quietness even at 1 a.m. No bars or disco but still super live street.
Also we encountered some problems with Internet. Maybe it is the problem in this country in general, but at the end there was no wi fi for me in the flat, just Internet with the cable.
All in all, I am satisfied with my experience in Murat's place.