We had a beautiful, peaceful stay at Paula and Rafael's place. The flat is cozy and clean. The balcony and the view are absolute highlights. I highly recommend staying here.
There are a few things which by no means are dealbreakers, but can be good to know. When we arrived someone had physically locked the building door and we couldn't get in with the electronic unlock, so we had to wait about half an hour for Rafael to arrive. It wasn't a big deal—sometimes stuff like this happens.
The upstairs neighbors were playing loud music (about 5-out-of-10 on the loudness scale) pretty early in the morning.
There's quite a lot of homeless people on the street from which you enter the AirBnB. It didn't really phase me, but I could see how it could make some people a bit wary.
Otherwise, once you're inside, it's a beautiful place to stay.