The apartment, though small in size, was well laid out, and thoughtfully decorated. It is in a quiet neighbourhood, the only noise we heard were the neighbours when they were in the stairwell. The bathroom had nice modern sanitary ware, and there was plenty of hot water for two consecutive showers. The host had even put a hairdryer in there, as well as a first aid kit. It was nice to have a decent sized balcony with seating. The bed was comfortable, the internet worked well and the mobile phone reception was excellent.
The apartment is just a two minute walk from the São Bento metro station and there are plenty of restaurants and other attractions nearby, all within walking distance. There is a tiny grocery store just around the corner (turn right and walk up to the top of the road), but we found a supermarket (Continenti) in a shopping centre near Bolhao metro station, well within walking distance. There is a food court in there too, with lots of choice.
We picked the keys up in the welcome centre, which is located close to Casa da Musica metro station. There was another supermarket (Mercadona) within about a five minute walk away from the welcome centre, good for picking up a few essentials as you arrive. The staff at the welcome centre were very helpful and you could leave your luggage there after checkout, if you had a late flight.
At the airport information point it is possible to buy a one-day or a three-day combined bus and metro ticket, which we found to be good value at €15 (cash only) each for the three-day pass.