Without the very loud noise from the street, our stay at Berkan's would have been perfect.
Berkan is very nice and helpful, communication was smooth and effortless. He always wanted to know if we needed anything, while letting us enjoying our space, and that was precious. Safebox to enter his place was easy to use.
His flat is located in a very old historical building, and there are incredible mouldings on the living room and on the bedroom ceiling. No problems about the fact that the flat has not been renovated, we knew it would come as a package with the historical bits of the building.
The only real thing you have to be careful about is your ability to put up with street noises. Staying near Istiklal might be troublesome, no surprises, but the sound level with the bar downstairs and the cars passing by with loud music until late at night (sometimes later than 2am) could be unbearable if you are not prepared.
Still, thanks Berkan, take good care !