We lived here for a week. It was a great trip. Amazing view from the balcony to the Bosfor and the bridge. Flat is very cozy. The district is quiet, old and beautiful. There is a lot of cafe near the place. It is not hard to get to the European part of the city. It needs 5-10 minutes by bus to get to metro and ferry stations.
Also, you need to be prepared for walking on hills and stairs because the district is on high hills (as like the whole Istanbul).
If you are looking for a not ordinary place to stay, choose this place.