I stayed in the apartment for 2 weeks in January 2013.

The apartment is very spacious. The description of the place is accurate and you find most of the things you need. The building is very safe (the 24h doormen are very friendly as well) and what is best is that it is really close to Ipanema beach - you can literally walk there in your beach clothes.

However, I cannot follow the previous comments how spectacular the place is and what a great host Felipe is.
The interior of the apartment is rather old and heavily used. Especially the electronic equipment is from the last century, you have to search for remote controls that work (most batteries empty) and the HiFi device even did not work at all (what is a pity, because the place comes with a great collection of CDs). Given that a TV and an iPod-dock do not cost much any more and that the apartment is definitely one of the very expensive ones you can find in Rio, this was rather disappointing.
I have never gotten to know Felipe personally, since he was travelling. I did have one request for an additional set of sheets (there was just one in the apartment which is supposed to be equipped for up to 5-6 people) - I never received a reply. What came very punctual however was the info on when I have to check out - a late check out was not possible.

Overall: The stay was ok, but not superb. I have seen better places (also in Rio) and I have also had more attentive hosts.