A very nice place, in a tranquil location on the Asian side that has nice restaurants and shops nearby. Üsküdar is a short bus-ride away and has connections to all ferry ports and the marmary metro line. All very convenient. A small supermarket is just 20 meters away, and there are bakeries, vegetable shops and various others in easy walking distance. Just be warned that there are two parallel roads with the same name, and our taxi driver brought us to the wrong one (50 meters away, so no problem).
The house is an old wooden house with a basement and 3 floors, nicely decorated and with all amenities. Everything is very completely equipped, and carefully maintained. We found it sparkling clean. The only thing you should know is that the stairways are quite steep, so that could be an issue with young children or people with mobility issues.
We stayed in the house for a week, 3 adults and 2 13 year olds, and enjoyed our stay very much. For a family trip to Istanbul, it is a fantastic place.