We were in Maria's apartment for two weeks during the World cup period and had a perfect vacation!
We were three and there was a lot of space for all of us and 3 comfortable beds except from the sofa.
The apartment include every little thing that you need as a guests and lots more: great kitchen facilities, beautiful balcony, big television, very good wi-fi, washing machine and lots of sheets and towels.
The location is amazing. Not too noisy (Botafogo Neighborhood) but right near the beach, few pubs, Restaurants and stores, and 5 minutes walking from the metro and bus stations.
Maria is a great host. She was waiting for us at the apartment and answered by mail on all of our questions quickly.
If you are coming to Rio, you must rent this apartment! You won't be disappointed...