Bahattin and Beste were very accommodating and amazing hosts. They helped us out when our flights were cancelled and were always there to assist with any questions we had.
The apartment is great, and they have some nice touches, that a lot of AirBnBs miss these days.
Id recommend this apartment (or any of the others they have - we have stayed in two so far) if you are coming to Istanbul.
The front desk team in the building are also really friendly.