This is really a very authentic (house is ~120 years old) and beautiful place. Original arched ceiling, transpatent sky view in the bath, Galata tower 24/7, 2 balconies, nice decoration, access to the roof - makes this apartment so special.
Extremely welcoming and caring host, one of the best I ever had. Moussaab replied very quickly, solved all my issues (heating, additional cleaning, etc).
Super location close to everything you need.
Little hard thing to do may be 6th floor no elevator. I paid additional to taxi driver for the luggage and used this opportunity for cardio training:) Also a little annoying may be sound from the shopping street in the small bedroom (they constantly pack/unpack something) and lights from the Tower, but its ok with the curtains.
Im also crazy demanding about the cleaning and it was a local cleaning level (in hotels its also not superclean) but I helped myself and the host provided additional service for the windows.
I definitely recommend! The best!