The location is perfect to visit Istanbul city center by walking.
The house is very nice, unfortunately we arrive there at the beginning of January and there still were some "memories" of the new year party probably done by the guests before us. Despite the house has been cleaned, there still were some dirty staff around and we provided to clean them. The host was super kind and reactive to our message and sent somebody to fix some broken stuff, but none came to clean up and we couldn't use the terrace (especially children, it was impossible to walk on it because of the dirt).
We tried to use the swimming pool, which is very nice, but it was supercold and it wasn't impossible to get in.