The place is exactly as shown in the pictures. Such a well designed and well equipped studio. It is at walking distance from a lot of the main spots like Hagia Sophia, Blue Mosque etc and a great restaurant just downstairs. Yusuf also has a booklet with recommendations and a travel card to make things so much easier!
The only con is that if you have heavy luggage, going up and down 5 flights of stairs is a little difficult. But that's true of most buildings in Turkey. And Selim was kind enough to help us out with our bags during check in. He also arranged a taxi for us when we checked out early morning the next day.
Overall a great place with super sweet and helpful hosts, highly recommended!