It can be said in one sentence: The flat and the host are amazing!
We spent 4 nights in this flat and it felt always a bit like "our home" in Istanbul, instead of beeing a guest for a few days.
It's really perfect located to discover more than the touristic beaten tracks and to dive into the lively and young site of Istanbul, but close enough to get to all the "must-seen" places shortly, as well.
On top, Bilgs tips are more than helpful. They guide you to places, you would't find or even chose, without his recommendations. Really: All tips we followed were great!
Our fave: having dinner at the greek Restaurant!