Staying in this apartment contributed hugely to enjoying our 5 nights in Istanbul. It's very spacious and has a splendid location: the Galata bridge is a 5 minute walk downhill, the start of Istiklal Street with its shops and restaurants a 5 minute walk uphill. The whole area is beautiful with cobbled streets and little traffic. It feels perfectly safe and is very lively day and night. As it's in a narrow side street there's barely any noise nuisance, except for a nearby mosque at 5 a.m. and some noisy cars during the daytime.
The apartment itself is lovely and feels very authentic. The quality of the beds is very good and there are plenty of towels. As we were staying in April we did not need the air-conditioning, but it seemed adequate cooling the central hall and all other rooms provided the doors are left open. Unlimited hot water, so no problem to take consecutive showers or baths. The only small minuses we found are the graffiti on the front door (but apparently this is an "arty" neighbourhood) and the fact that the dining table is set against the wall in the central hall, which is fine for a quick breakfast but makes it less suitable for fun dining. The three flights of stairs were no problem for us, but might be for other people. I will definitely select this apartment again for any future trips to Istanbul!