I wholeheartedly recommend a stay at Bahri's place. It is in a great location on the Asian side of the Bosphorous in a quiet residential area about 10 mins walk to the Harem ferry crossing which takes you to the European side. It is about a 10 minute taxi ride to the absolutely buzzing nightlife of Kadikoy on the Asian side. Bahri's apartment is peaceful and the large terrace has a beautiful view of the Princes islands in the Sea of Marmara. The best thing about the terrace is that it is is completely private. It is not overlooked by anyone and I loved spending my mornings there. Some people might not like entering Bahris apartment first before you climb the stairs to the penthouse but Bahri and his family are so welcoming that it should not put you off. Enjoy your stay. Istanbul is an incredibe city.