The appartment was very well placed, near to Taksim square, in the very living area of Beyoğlu. the appartment was as we expected (and as on the photos) and Emrah told us that as it was on the ground floor, it would be less sunny than the upper ones so if you go for more than 3-4 days, better take the upper appartments. The terrace on the top is very cosy, perfect for your breakfast and well equipped, just bit too warm during very hot days.
Otherwise Emrah and Hakan were very helpful, kind and the communication was smooth. I would definitely recommend this place and take this appartment the day I get back to Istanbul.