We stayed at Heinz's place for 4 nights. The apartment is centrally located in Copacabana and the listing on Airbnb is 100% accurate and the room was easily big enough for 2 adults. The building and general area are very safe and there are plenty of restaurants nearby. Heinz was amazing and met us at the airport to take us back to the apartment and even arrived when we check out at 3am to head for the airport, that's really above and beyond what I would every expect from a host! Our only detractor from the stay would be the noise in the area. It's very loud at night. We did struggle to get to sleep a couple of nights until about 2am, so if you are an overly light sleeper you may want to weigh this up.