I can definitely recommend Yusuf's apartment. It's a hotel style, which while not normally my Airbnb preference, was really helpful in Istanbul. It was very handy to be able to arrive very late at night, have our missing bags received while we were out and receive advice from Yusuf and his excellent staff. The room we had was nicely decorated, spacious, clean and comfortable. It's also really well located, within a comfortable 10 minute walk to the blue mosque.