Unfortunately, my stay at Claudia's place in Ipanema was extremely disappointing. Though the location is amazing, the apartment has 1 window that faces a brick wall and there is no light at all.
Second, there's no wifi, which would be fine if there was a reception, but I couldn't get reception with either Tim or Vivo (local Brazilian mobile networks). This meant that working from there was impossible.
Also, I had issues with cleaning, with the place being very dirty when I first arrived.
Finally, the place is very noisy, you can hear everything happening with neighbors.
I ended up cutting my stay short from 1 week to a single night, and moved to a hotel the following day.
On a positive note, Claudia was super helpful with check-in and allowed me to arrive 2 hours earlier. The location is also perfect, close to the beach and restaurants/bars.