I really enjoyed staying in this apartment. It was cozy and clean. I liked the location too. Most of central Lisbon was in a walking distance, 10-20 minutes.
I never got to meet any of the hosts though cause the key was simply delivered in a small safe box right next to the apartment which made check-in and checkout easy and flexible. A small local market right around the corner and a bigger mini supermarket only a few minutes away. Depending on where you come from and/or go to, be prepared to climb hills - it is Bairro Alto after all ;) Tram 28 stops right around the corner too. Only thing is that, because of the really hot days in Lisbon, the apartment got really hot and kinda humid during the day - and the “air conditioning” is basically just one fan (that stands on the floor, can be moved from place to place), which is helpful but not quite enough to cool the whole place down. Opening the windows at night helped though.