That's a small, but lovely studio with kitchen and bathroom. The Balat district is unmatched, it was just perfect for me. Also, you can easily get here, even if you aren't familiar with Istanbul transport. I loved place very much, but there's some issues in apartments:
1. Heating.
Even when fully opened, the heating battery was just warm and it was pretty cool inside, until the outside temperature increased. (We was staying at Feb 14-21, and temperature was 7-15°)
2. Splitted beds.
There are two single beds instead of one bed for two person and it was real pain, because I was staying with my wife. They was always separating from each other and I was nearly falling in the hole between them