Unfortunately this was one of the worse experiences my girlfriend and I have had at an AirBNB. Savas was a very nice and responsive host - but there were some serious issues with the place.
First - the positives, the location is fantastic and the home is clean. Unfortunately there was a horrible sewage smell that came out of the bathroom floor drains starting the first night and filled up the whole house. We tried closing the doors, etc. but the smell was almost unbearable and we ended up chosing to stay elsewhere the rest of our trip to Istanbul.
Further - upon check out Savas was again very accomodating and offered to let us check out 1 hour later at noon. Unfortunately the housekeeping staff let themselves in before that time and proceeded past us to the balcony to smoke cigarettes. Then they let the other guest into the home - which was very awkward for all parties (new guest looking at the house still not cleaned after us, and us trying to get our bags out past them, while the housekeeper sat outside smoking.)
Finally - as we were leaving the housekeeper came to us in the stairwell and asked us to please give them money for cleaning. We felt uncomfortable enough that we ended up giving them some cash. This seemed totally inappropriate given there are cleaning fees, etc. already on the listing.
If these issues can be fixed this place has great potential. 2 stars (and that is perhaps being generous now that I re-read this write up).