The best part about Joaquim's apartment is the location - in the centre of the city, a few minutes' walk to the nearest tram and bus stops, and about 20 minutes to the metro station and food market. My friend and I stayed here for a week and worked remotely for 5 days, and the WiFi was super fast and consistent. The apartment was spotless when we checked in, and we enjoyed the comfortable bed and hot showers. We were warmly welcomed by Maria and her husband (Joaquim's parents) when we checked in, and they were lovely and showed us around the apartment.
If you're worried about accessibility - the apartment is in the older parts of the city, so the street it sits on is on a slope, some parts of which may feel a little steep. But the house itself is on the ground floor.
All in all, a great stay. I would highly recommend if you want a quiet place close to the city centre surrounded by countless cafes and restaurants.