You probably won't find anything better than Claudia's apartment in Rio.
The location is great, really close to the beach, and public transportation (train and bus), grocery stores, pharmacies, excellent restaurants and more.
The apartment is fully equipped with everything you need (specially if you are American, there are some appliances here that you usually find in Brazil), plus the awesome outside area and private pool!
The communication with Claudia was excellent. She was very helpful at all times!
Highly recommended!