It's extremely difficult to find a good place in Istanbul considering traffic and accessibility issues. Emrecan's place is situated VERY near to the coast of ORTAKOY. Its not too near and not too far so you don't hear the traffic and you don't have to walk so much either.
ORTAKOY, in my opinion, is the best place you can live in Istanbul. You can do some shopping in ORTAKOY, walk on the coast, cross the sea and go to KADIKOY, go to BESIKTAS, KARAKOY, TAKSIM, GALATA, or go to Zorlu shopping center. Everything is very near and you won't get stuck in traffic.
Emrecan was very easy to communicate with. He replies immediately and offers his help often. It was very simple to get into the house as the key was outside the door in a safe. He let us know the password of the safe and how to find the house before our check-in date. He also sent us a very detailed email of all the restaurants and places we should visit. My girlfriend is Turkish and she has been living in Istanbul all her life . She approved of that list :D
The house was very clean and tidy. Everything was organized. We were allowed to use everything in the kitchen(fully equipped).
We had a wonderful time and hope that we could stay there again. I have lived in a lot of airbnbs in Istanbul and It is arguably one of the best ones so far.