I stayed at Hasan & Alina's place for two nights. Everything was very good and the hosts were clear in communication. The street is not very quiet because of the bars downstairs but on the other hand this makes it safe after darkness. It's half an hour by bus from Kadıköy, and the bus stop is one minute from the house, metro station is 15 minutes, and the sea is not far from the house too. Good and safe place to stay if you're fine with public transport and don't want to stay in the heart of touristic neighborhood.