We stayed at Paulo's flat for 5 days.
The best thing is the location, as the flat is located near the canal and a lot of restaurants and shops. Tram number 2 takes you to the city center within 15 mins.
The flat is bright, clean and simple. The kitchen is equipped with all the basic appliances (and a moca pot, which is a nice bonus).
The only thing to consider is that the apartment is not super quiet. You can hear people going up and down the staircase and sometimes an alarm from one of the cars on the street. Nevertheless, with a pair of earplugs, you will do just fine.
The wifi connection is great.
There is a minimarket next door and a bigger supermarket 5 mins walk from the apartment.