It's a great place for active leisure in the heart of the Kadikoy. Be prepared for some noise from the bars directly below the apartment, so it can be difficult to stay with kids, but ok for people who come to get the feel of the area. Also there might be a little smell in the backyard because of the cats :) but it goes away pretty quickly.
The apartment has a great interior and a very comfortable bathroom and bed, plus fast Wi-Fi and lots of great restaurants and cafes in the neighborhood, so if you're coming to explore Istanbul, this is a good catch.