Although I never got to meet Mario, he's an excellent host as everything was very organised, instructions were clear and he was very responsive throughout our communications.
As I arrived in Porto super early in the morning, Mario accommodated my request for early check-in (just to put my backpack and use the common toilet) while being very thoughtful for his other guests by requesting I only enter the apartment at 11am (one hour before check-out).
The room was exactly like the photos and the free breakfast at Nata Lisboa was a bonus. Location of the apartment is superb.
Once again, thanks for everything Mario!