This apartment was very clean, and we really liked that the two bedrooms were at opposite ends of the hallway. It also had a nice patio off the kitchen. The bedroom closer to the door did have some street noise, but the other one was pretty quiet. We only went up to the rooftop once, since the stairs are kind of steep for folks in their 60s, but it did have a wonderful view.
Although the location is well situated for walking around New Town (right next to the Galata Tower), the street itself has a lot of electric supply houses that unload trucks throughout the day, which can cause traffic to backup. Keep this in mind if waiting for a taxi pickup.
The host helped us out by arranging for transportation to and from the airport, which reduced some of the stress of catching a cab.