Really enjoyed staying at Ali and Asli's lovely apartment. First, the location is perfect for exploring Beyoglu. Not only is the apartment near Istlikal and Taksim but it's not right there...and so it's relatively peaceful. There are grocery stores and nightlife and great restaurants less than 5 mins walk away (some just outside the door). In short, conveniently located but not in the center of the craziness.
The apartment itself is much larger than I had thought it would be from the photos. It's decorated tastefully and has the conveniences you would expect.
As for the hosts, Ali was really great. He reached out to me several times in advance of the trip as well as when we were there. He even stopped by to have a quick chat and offered to take us out for drinks. Really cool guy.
In short, highly recommend.