The apartment is pretty much in the central of Porto, the Campanha and São Bento stations are within 25 minutes on foot, the next metro station is also only around 10 minutes walk away. The whole building are used as airbnbs and is conveniently accessible by codes, so no in person check-in was necessary.
Overall the flat is clean. But the shower cabin could use a good thorough scrubbing (there is discolored grime on the bottom, which could be overseen with the normal cleaning routine).
Since the flat came with a kitchen, it would have been nice if some basic necessities like salt, pepper, sugar, oil, etc. had been provided. These things aren't expensive but such a waste to buy just for a few-days-trip. Also we stayed for 7 days and were provided with 2 single ply loo rolls, which for 2 people lasted solely 1 day. I'm sure this could be improved for future guests.
Overall a very positive experience. I could see myself renting with them again on my future trips to Porto.