Silvia's penthouse flat is AMAZING. First let me start by mentioning that Silvia speaks English as well as Portugese which was extremely helpful for me (my traveling companion spoke portugese but I didn't speak any). If you're going to try to get a luxury Rio experience but not pay the resort costs, I'd highly recommend Silvia's place.
Her place is tastefully appointed and every modern luxury you need is available. She even had power converters in her wall sockets which was extremely useful.
The view from the balcony can't be beat with an unobstructed view of the Redeemer. I can't say enough great things about Silvia and her place!