The stay at Mario's was okay. The apartment is not as nice as it seems in the pictures, and lacks sunlight. In fact, there are no windows in the bedroom. The living room and kitchen are basic but are okay. The bathroom, on the other hand is very humid and cold, leaving our towels wet and even colder. A little radiator for winter days would be nice.
On regards to Mario, he was okay however we had troubles to meet him at the beginning. He told us we could leave our luggage in the morning even though the apartment wasn't ready, which was very nice of him but at the moment of the arrival he didn't answer our calls and at the end told us he wasn't going to come, so he gave us vague instructions on where to leave it and how to open the door. When confirming instructions and the access code for the door Mario seemingly hang up on us. When the apartment was ready Mario sent us a text to let us know. When we arrived however, he was not there to meet us, and didn’t answer our phone calls again and a "friend" of his finally answered us and told us he was going to check which one was our apartment. It was here that we realized that Mario is not the owner but an employee of a company called Oporto Now that rents appartments in the city. While we were waiting for Mario we were given again vague instructions over the phone on which apartment was ours, to look for the one (there were several) with the keys hanging in the door. This proved difficult as the apartments had no numbers or anything to help identify. When Mario finally arrived and showed us our apartment, he was pleasant enough and gave us a couple of places where we could eat, though made very little eye contact and made us feel slightly uncomforatble. He also told us “that he enjoyed his time living there” and that “his former neighbours were very nice”. Though we are sure that this was After check-out he let us leave our luggage again in a little strorage room till our time to go to the airport came, and we saw another guy from the company showing the appartment to another couple that didn’t come by airbnb, confirming us it is a company.