I stayed at Katia's apartment for about six days. The apartment has pretty much anything that you could ask for, it is well equipped and safe. The location is in Centro where you can see some well-known attractions nearby. I personally stayed there because the apartment is located nearby the US consulate which takes about 5 minutes to walk. I definitely recommend this apartment!
Lastly, Katia and Paulo are great hosters. I am truly grateful for all their friendly support and communication during the stay!