Berk is a great host - gave us a lot of useful tips and was always quickly answering and solving all our problems!
The location of the apartment is very central, which makes it perfect if you are in Instabnul to experience the nightlife. But if you are on a family vacation then be prepared to hear a club nearby blast out music until 2 am (and definitely bring a white-noise machine for the kids so that they have a chance to fall asleep).
Also beware that the bedrooms are all connected except one (the big bedroom is a walk-through) - if we knew this in advance we would not have booked it for our two families.
Otherwise, all is as advertised!
The elevator worked when we checked-in (thank god!), but didn’t work when we were moving out.