Eray's apartment is in a very good and also quiet location. You can walk around Besiktas from there to taste good turkish food or drink a beer, and also very close to Taksim square. If you have any question, Eray and his girlfriend are very friendly and helpful. Their cat is also very cute. :)
And guys: there is no mosque (no muezzin) in the close area, so you can sleep till you want! :)