Mario's apartment in Porto was great! The location is very central to the city, and there are plenty of great restaurants on the same street as the flat.
The bed was SO COMFORTABLE. It was exactly what we needed after already traveling for a month on tour and sleeping at various venues.
Clean, spacious, private, and comfortable. Everything you want to come home to after walking around such a beautiful city.
The only minor thing was a bit of confusion with the checkout time, but it was easy to communicate with Mario and things were easily resolved.
5 stars!