We had a great time at Revşan's flat. She met us close by to Taksim Square after we arrived from the airport, and too us to the flat even though it was very late.
The next day she gave us great recommendation for breakfast and was very nice when we called to ask for directions because we couldn't find the place.
The flat is really comfortable for two to three people, taking that one person could sleep on the sofa. Very well distributed and in one of the oldest districts in Istanbul.
The only thing to keep in mind is that the flat is on the fourth floor, so if you have any problems with stairs that might be something to consider.
Revşan also met us when we were leaving to make sure we were happy with the flat and had enjoyed our time there.
Revşan is a very good and nice host.