I had a very pleasant stay in Alexis's place, and, on future trips to Istanbul, would be glad to stay here if he'll have me back. :-)
Alexis's flat fulfilled many of the options I was seeking in an Airbnb space: walkable neighbourhood, easy access to public transit, residential but with great access to restaurants and nightlife; and Alexis's home fulfilled all these criteria.
Additionally, the space is clean, private, excellent value for money, and very well-appointed...among the best Airbnbs I have so far stayed in.
Alexis was helpful throughout my stay, and I especially appreciate the fact that his lovely parents stayed to welcome me even though the check-in hour was quite late.
I recommend Alexis, his place. and his lovely parents to you all. :-)