Good place in a great location. It is in Besiktas which is one of the most interesting regions of Istanbul with a lot of coffee shops, bars and restaurants. It is 10 minutes on foot to the vapor station. Flat is suited with all needed things for living. The view from the window in the living room is amazing, we admired it very much.
Yiğit is a very polite and friendly person, the communication was great, he offered us a coffee when we had arrived to save us from tiredness after the road :)
As for cons: be careful because this flat doesn't have a separate place for smoking, and it is permitted to smoke all over the flat, so if you are ok with the smell of smoking you will have a nice time here. Also some things need to be repaired, but nothing crucial which may prevent you from comfortable living here.