We stayed for 6 nights in the apartment and enjoyed it very much. The living room is even bigger than we expected from the pictures, with two very large sofas that are more than comfortable to sleep on, and the bedroom is spacious and homey. The flat is perfectly located - 2 minutes walk to the tram station towards the old city (3 stops only) and 7 minutes walk from Istiklal street with all the restaurants, shops and bars you could ask for. also there are 24\7 minimarkets just around the corner and various bars and restaurants within 2 minutes walk each way.
The arrival was very easy - Lino sent me the directions to the closest tram station and there I met Gaetano, her brother, who escorted me to the apartment and showed me the place.
The apartment was clean and organized, equiped with all the basic needs - soap, towels, dishes, oild and spices. there is even a laundry muchine in the bathroom if needed.
Should be noted that the apartment is in the 4th floor with quite narrow stairways to climb. could be problamatic for older visitors. for us (25 year old and his mom) it wasn't too bad.
all in all, I highly recomend Lino's apartment for 2-4 people (2 on the double bed and 2 on the living room sofas and there is also a baby bed) and I'mdeffinately going to send there friends who wish to visit Istanbul.