Seçkin is very nice and hospitable host and he has a lovely calm cat!
Location is good, it‘s very close to Marmaray station and in 10-15 min walking distance from Kadiköy pier, all the nice things of Kadiköy are near.
Flat is clean, tidy, warm in winter and has all basic things you need.
Bed looks a little bit old and weird but is ok to sleep several nights.