I've lived in Istanbul (as a foreigner) for over 10 years now. As I had family visiting, I wanted us to all stay together in a nice apartment in a hip neighborhood. Behic's place was a smashing success. The location is easy to find and in a very central and safe location. Lots of hip cafes, restaurants, pubs, etc. are all in immediate walking distance, and it's just a couple of minutes from the famous Istiklal street. Definitely one of the best areas you can hope for when making a visit to the city. If you want to go to the old city and most of the historic destinations, it's also easy to just walk downhill and hop in a tram or get on a ferry.
The apartment itself was wonderful. The furniture was comfortable. I especially liked how the bedrooms were far apart from each other. The view out the windows are amazing. If you go upstairs to the terrace (there's an elevator), you can enjoy some relaxation and an even better look at the Bosphorus views. The building is quiet and everything was as advertised. We left well rested and a bit sad to be leaving such a nice place. If my family visits again, will definitely re-book.