We stayed two times in Fabio's apartment: In the beginning and in the end of our trip. We can basically just confirm what all the others have already said: The apartment is perfect in every aspect, except for some road noise in the bedroom. But as someone also already mentioned, that is part of the package if you want to stay central - Bring earplugs if you find it difficult to sleep if there is some noise. But that is the only downside to the apartment. Location, equipment, cleanliness, safety etc. is all perfect. We stayed there with our 4 year old son, and we had plenty of room.
Furthermore, Fabio is the perfect host. Friendly and extremely helpful. He stored a bag for us between the two stays when we were traveling around Brazil. I attended a conference at the end of the stay and didn't want to carry laptop and suit around Brazil, so it was a great help that we didn't have to carry this bag all the way. Another example, when I checked out of the apartment at noon on the last day there, I was planning to go to the airport and just wait there and do some work for 6 hours until my flight (the next guests were arriving, so I couldn't stay longer in the apartment). However, when I told Fabio about my plans, he took me home and served up great lunch and lots of coffee. Needless to say, I didn't get much work done, but instead had a really pleasant afternoon getting to know Fabio and his deaf dog better.
Bottom line: I highly recommend this place.