We liked to stay with Julia and her girlfriend and they are really nice and helped us a lot. The apartement is a bit outside but you can easily take a bus (1min away) or a Uber to the center (around 20-30 Real) or to the next metro station (around 8-10 Real).
There are just a few things which they should improve. The bins were often pretty full and since they offer breakfast, they should keep an eye on the amount of food. We had to use our own butter from the second day on because it was empty. They have a dog, which is friendly but he barks a lot and steals food if you don't pay attention. Also there is always dog poop on the terasse.