Akif was a easy to contact with WhatsApp (didn't have a change to meet unfortunately) and the flat is a good size and great location. The flat has charm but is not luxury, it seems to actually match the original intention of Airbnb of sharing people's normal lived-in homes instead of doing places up as 5-star hotels - so if you expect that you won't be disappointed.
There's one AC for the place but it does the job if you keep the doors open. There are steep stairs but the whole area of Galata is steep!
There's a mini supermarket just down the street but the kitchen is a bit small to prepare anything elaborate.
A fairly easy walk down the hill to catch the tram to Sultanahmet and all the main sites.