My parents and I had a great time in Berkan' house. The location was great, and it was very near to Taksim square. The house is much better than photos in the airbnb website. It was spacious with 3 rooms, and each room has it's own double bed.
Moreover, Berkan has a great communication, he sent message every day to check if everything is OK. More importantly, he is very flexible with check in and check-out. He let us to check-out late, and it was very helpful. As he mentioned in the rules, the house is in 3rd place with no elevator, it was a bit hard for my parents but not very challenging. The house is not designed as a modern house, but it has everything you need for stay. Totally, I would recommend this house.