Great little spot, super clean and well equipped, in an excellent location - quick walk to both Kadikoy and Galata. Each of the units is a little different and only two have their own balconies, but the shared terrace on the 5th floor has amazing views and we usually had it to ourselves.
Note it is a studio, with a little couch across from the bed and a TV you can swivel around - but no separate space for eating or lounging. I was not totally clear on this from the pictures.
Ugur is fantastic, very responsive and met us at our taxi when we arrived. He also immediately told me about the credit card I left behind in the unit and sent pictures of it cut up when I asked him to destroy it - a great host!