Wonderful expirence in Istanbul, whole trip was good, we havents seen Mersin, but his assistant was there to meet us, and show the flat, we were in contact with Mersin, and were gettinig info immediately.
We were staying in the apartment with a child, apartment has very good heating, and you will find everything you can need in (washing machine, hairdyier, iron,etc)
The flat is new renovated and very cosy)))we really enjoyed time there.
A few wors about district, I liked it more then any other in Istanbul, a lots of cafes, bars, small shops with hand made leather goods, jewelry, art studios.
Definately recommended, For sure If ever come to Istanbul again stay in a same place)