The good:
The apartment is located optimally for exploring the heart of Istanbul and is easy to reach from the airport if going to Taksim square.
The bad:
There was no remote control for the air conditioner.
The shower, even though instructions on how to use it were provided, did not work properly and could seriously hurt someone. When I used it at some point instead of water, hot steam started to come out.
We were two people and wanted to sleep on 2 different beds, yet there was only 1 pair of sheets for sleeping in the entire apartment.
There were also no kitchen towels or sponges, so it was impossible to wash the dishes.
The apartment itself is very basic, but works if you just want to sleep in it. Unfortunately, without a working air conditioner with the windows open this is not easy with all the noise from the central streets of Istanbul, as well as the front door which is incredibly loud.
All in all, I do not understand how this apartment has got the high rating. Unfortunately I cannot give it more than 3 out of 5 stars.