Kai's place is great!! The location is perfect; right by Copacobana beach, grocery stores and many good restaurants. Our favorite was Gua.pa! Being tourists, it was also great for us because it was kind of the center point for everywhere we traveled (Tijuca forest, Sugar Loaf, Christ, and downtown and the museums). The Metro was a mile away, Taxis and Uber always readily available.
Kai was a great and attentive host! He met us at the apartment and was in close communication up to that point. He walked through the apartment with us and everything we needed to know. The bed was very comfortable, there's a nice breeze coming from outside overlooking the ocean. The plants inside the apartment and art make it feel very comfortable. He also had water, beer and Guarana for us in the fridge.
Overall a great experience and highly recommend!