It was really easy to be in contact with Mersin before the trip. He answered to my emails quickly and he arranged for us everything we needed. He was a really good host.
When we came to Istanbul we took a taxi as Mersin has told us to do. Mersin wasn´t in Istanbul but he gave his contact persons number. We called to him when we were in taxi and he spoke to our taxi driver and explained how to get to the apartment. The contact person gave us the keys and show the apartment. He didn´t speak any english. When we came to the street where the apartment was located it didn´t look nice. After being there for few days we realixed that eventually the apartment is in really good position.
The apartment was really nice. It looked exactly like in the pictures. Kitchen was nice and had modern equipments. Bedrooms were cosy and bathroom was in good condition. Balcony wasn´t in good shape.
One negative thing in the apartment was that it hasn´t any air conditioning, only one fan. It was quite hot all the time and in the nights it was really sweaty. Apart from that me and my girlfriend enjoyed very much our time in the apartment.

I truly recommend this apartment if you are going to Istanbul!