Birol and his lovely house are amazing, the place was in the best location in Istanbul, it's half minute away from heritage Galata tower, restaurants, coffshopes and shopping area, 2 minutes away from Sishane metro station, and 5 minutes from Istiklal road.
The house is too big with 2 seating area and 3 nice bedrooms, the beds is so comfortable.
I would definitely stay there again if I ever go back to Istanbul.