The appartment has a great location which is a 5-10 minute walk to the taksim square.
The only thing with the location is it is down the hill which is maybe for some people difficult to reach.
The communication with the host is great. When I had questions he answered almost immediately and was always available to help.
Furthermore the appartment itself is very spacious with 2 bathrooms and a big kitchen. The appartment needs some little renovation to make it perfect.
To spend some days in istanbul this appartment is great.