Me and my girlfriend had an amazing experience in Rio. We stayed for 4 nights in this apartment that is perfectly located between both Ipanema and Copacabana, close to a 24 hour supermarket (all less than 5 minutes walk). There is also a fantastic (but expensive) restaurant located at the end of the road called Fasano, which I would highly recommend. All the main tourist attractions are a short taxi ride away (no more than R$30 - £6).
The apartment has everything you need for a comfortable stay including towels, some toiletries, beach bag, umbrella, etc..
As standard in Brazil, the apartment always had a doorman so we felt completely safe.
The only criticism would be that the mattress was a little hard but apart from that it was perfect! I would highly recommend!