It was perfect, a nice apartment in a really good neighborhood (safe and perfect location) . Copacabana beach can be reached crossing only 3 streets, and Ipanema's can be reached easily on foot (less than 10 minutes).
I only missed a bigger table for daily life ans meals in the flat, but if you are only sleeping in the studio, you won't miss it at all.

I found Code-Key really usefull, because we can check in the flat at anytime, it's like everybody had a key, and it's impossible to lose.