I did a reservation for a studio to Kerem but i didn't have at all the same experience than the others airbnb's users in this apartment.
It's true that this apartment has a great situation (very close from the center of Besiktas very active and full of life but hopefully in a little street more quiet) and Kerem is a very nice host (he answers very fast and try to make your stay comfortable).
Unfortunately, the apartment wasn't great.
In the first we tried, there was an awful smell of cigarette smoke in the entire apartment (even if it was clearly written on the ad that it was no smoking), the shower didn't work and the audio isolation wasn't good.
I wrote to Kerem and he answered and came very quickly. He proposed us another apartment for the next night and we accepted.
It was better in the other apartment but still a lot of little problems so we decided to leave cause it wasn't possible to stay for us. Too much problems in only 2 nights.