I can't but recommend this space because it is located in a great place close to everything you'd want to see in Kadiköy, it's a minute away from the best food places in the area and at the same time it's calm. I honestly felt like home there, the room is big simple cosy and very luminescent. I was able to work from there as well. Now about Bilgehan the host he's really someone particular to meet, respectful , he helped me a lot and eventually became friends.
PS: i was concerned at first when i read some comments that it is cold in winter, well i guess they just didn't increase the heater. The whole house was super warm and comfortable with the one of a kind storm that hit Istanbul recently