Very nice and helpful host. Good location in a quiet place near metro (M4 line, up to 10 minutes on foot), there are lots of groceries and cafes around. ~30 minutes on foot to a sea shore, a park and marmaray train station.
The apartment itself is pretty well equipped, but hot water boiler size may be not enough for 2+ persons. The internet connection is very stable. There is a small yard outside with a huge window to it.