We had a great time at Marcella's apt. It's perfectly located in Ipanema, two blocks away from the beach, close to bars, restaurants and shops.
The apt. is a nice place to stay in Rio. It's clean, and has everything you need. The hand over of the key was done by the housekeeper, it all went smooth, but she didn't speak anything but Portugese. This makes it hard to ask questions if Portugese is not spoken by the renters.
Marcella is very flexible, we could prolong our stay with two days without any problems. Marcella reacted quickly to our questions and requests which made our stay very pleasent. I would definately recommend the apt. to visitors of Rio.