My partner and I stayed in this Airbnb for two weeks and it was by far one of the best we've ever stayed in. The apartment itself is exceptionally designed, with lots of space, fast wifi, strong A/C, and hot water. The washer/dryer was also super handy. The area you're staying is central to anywhere you want to go in Rio (including the couple steps to Copacabana beach). Just be aware that the proximity means you'll hear the natural hustle and bustle of the city if you're not accustomed to big city noise.
Juliana and Laura were the most accommodating hosts. Whenever we'd message them (even if after midnight on a Saturday night) they would reply within minutes and with a solution to any issues we may have. Because we were staying so long, they had someone come change our sheets halfway through. They even gave us a generously late check out time on our last day, as our flight was very late.
I could not recommend this Airbnb more and I would 100% come back to Rio and stay here.