By one night staying in Porto, we didn't see Mario in person but he did prepare us the things we needed and explained us clearly in details how to get to the apartment. He is very helpful, when we have something to ask he reply in no time. The apartment is very very close to the shopping center, touristic area, and close to the metro station. The room is a bit too cold but cozy and clean. We had a good night staying in Porto thanks to Mario's room. :') This is a recommended place to spend nights when visiting porto.