Both of our hosts are very friendly and informative. You can always ask them about places or events in Istanbul and they will give you the honest answers or opinions. Erkut, one of the host even let us to eat the food in the kitchen (breakfast). One night we had tea and he offered us homemade cookies. In a nut shell, it was a very pleasant hospitality. The location is pretty good. Surrounded by cafes and restaurants and about 15 mins to public transportation hubs.
Kadiköy in Istanbul is like the Kreuzberg of Berlin. If you want an authentic experience and stay together with the local people who really live in Kadiköy, then this is the right place for you.