The house is great to stay when it's warm outside, as it's located on the basement-level floor, so usually it's colder there than on the outside. The terrace is a really nice addition.
The location of the house is also nice, as subway and a lot of buses is not that far.
The host, Yücel, tries to fix any occurring issues, while also responding swiftly. We were allowed to stay for few more hours, because our transport was leaving late in the evening.
All in all, a good apartment to stay on the European side of Istanbul, close to the center, while not being in the center of the noise of the city.