I stayed at Devrim's home for 6 nights. It was very clean and cozy.
It was close to Taxim Square, and it was conveninet to take tram to Sultan Ahmet.
When we booked Dev's home, I sent her recommendation list for restaurant and sightseeing and so on. It was more useful than guide book. And there are a look of guide books about Istanbul at Dev's home.
Above all, I think it was lucky to have an opportuniy to stay at the home where host's taste and interest are shown.