The apartment is really big, can easily host up to 6 people. The second floor is very spacious aswell but they could do more with that space in my opinion. But i guess you don't really need it while you're in Rio! :-) The third floor is really cool aswell, but as i already said, its too less chairs and stuff to relax and chill there aswell.. there was just one deckchair for example... if you are 6 people it's not really handy.
The location is absolutely perfect! One street to Copacabana and to Ipanema is easily within walking distance reachable.
we enjoyed our stay a lot.