I never physically met Ivone, although we conversed via messenger and she was very responsive. However, the listing is more like a hotel, with a front desk and check in/out (note: their english isn't the best).
The apartment itself is as the photos depict, incredible views and nice rooftop pool. Every room is equipped with A/C (although the living room didn't work during our stay). Wifi was a bit odd, you have to login to some 3rd party page with specific credentials.. worked sparingly, but let's be honest, you're in rio for the beach, not to be online in an apartment.
The neighborhood is fantastic, located just a half a block from the major avenue in Leblon and a couple away from the beach. Would definitely stay here again if available.