I’d highly recommend staying at Josef’s place if you’re looking to be in the heart of Galata. They were extremely helpful and communicative before and during our stay. Have great recommendations and helped us book a 5 AM taxi so we could get to the airport on time for our early flight.
The rooftop is amazing and was empty every time we went up there. The apartment has enough room for two people to stay comfortably. If you’re traveling to Istanbul for a few days I’d highly recommend it!