We loved our stay! We got to leave our bags in the apartment during the day while they were cleaning, and got the key early and they texted us when it was ready for us. The apartment was bright and airy, and stocked with tea and coffee and soaps in the shower. Bed was super comfortable (hard!) and the communication was superb. Mario responded quickly and was super helpful. The location was perfect, right in the centre of the city and walking distance to more or less anything. The apartment was on a quiet back street, but it was an old buildning so could be noisy if there were people outside. This didn't bother us at all though. Would definitely stay again if we come back to Porto, recommend it! Great value for money.