Gorgeous penthouse has large terrace and beautiful Princes' Islands view, which are Büyükada, Heybeliada, Kınalıada.. Seaside is about 5 minutes walk and it is available for walking, biking and sunbathing.
Metro station: 10 minutes walk
Kadıköy: 30 minutes with public transportation right from the apartment door
Bostancı (passenger boats): 15 minutes walk
Also landing to Atatürk airport is an advantage, you can take ferry from Bakırköy to Bostancı like locals.