Berna´s place is exactly as pictured. The bed is comfortable and the room is very quiet, almost no noise from outside.
The check in is very convinient, because the doors has codes, so no key is needed.
She was very thoughtful and left me a bottle of water and chocolates, cause i arrived late at night.
The building is on a hill, but almost all of Beyoglu area is like that, and for me is the best area to stay in Istanbul, so you cant hardly scape that.
Berna was very helpful arranging a last minute airport pick up and helping me with my nightmare of lost luggage with turkish airlines.
I recommend staying there!