We had a lovely experience staying in Fahrettin's apartment in Beyoglu for 2.5 months in winter 2014/2015. The apartment was in good condition, had pretty much everything we needed and most importantly Fahhrettin was very prompt whenever we needed anything. He and the building manager, Mahmoud, we kind, courteous and very helpful. Fahrettin met us on our arrival, provided everything we asked for and checked in with us periodically. He responded to our texts or emails almost immediately and was always able to fix anything that came up very promptly. The neighborhood is in a GREAT location, within easy walking distance to Istiklal and Galata, but also outside of the main bar/clubbing streets which are doubtlessly much more noisy at night.