I highly recommend Celia's apartment and it's on my top list when visiting Rio. The place is spacious and very quiet including modern ACs that don't prevent you from sleeping. There is a nice patio with a small garden, where you can catch a glimpse of beach both from the Ipanema and Copacabana sides, and the walk to any of them is pretty short. Several grocery stores are nearby, and for breakfast I recommend Apetite cafe which is around the corner.