Mario's apartment is a great place to stay and an excellent base to explore Porto. The apartment itself is tiny and it can get very hot. We had backpacks and were able to fit everything in, but it wouldn't work if you bring large suitcases. Check in was quick and Rafael was very friendly and gave us a few tips for our stay in Porto. The views from the room are amazing and we particularly loved having meals at the apartment while enjoying the view. Thanks Mario.