Cozy and modern 3br apartment in the antique / art district. Great space, functional kitchen, nice light. The shared rooftop patio is a nice addition. Comes with the modern amenities and a 5-star host. It is located right in the center of Beyoglu, just a couple blocks away from the main pedestrian street. Nights can get noisy from the nearby bars and traffic (probably seasonal), so beware if you're a light sleeper or go to bed early.
The internet is fast. You have to be able to walk up stairs to the 3rd floor (no elevator). It's well setup for an extended stay (we stayed for 1 month).