Arrival:
The apartment is very well-located. Right in front of the train station (No worried about the noise, the windows are soundproofing). We told Mario our arrival time. When we arrived, he's already waiting us on the street. It was very thought of him. Mario and his wife stayed a while to show us the apartment and give us some travel tips for the city. That's another bonus point!
Apartment:
The apartment is exactly the same as the photos presented. Super clean and spacious. Walking distances to main attractions. The building was renovated so everything is quite new. Equipped with a lift so travelers have no need to sweat their heavy luggage.
In short, Mario, his wife and the appartement are just fantastic. We will definitely want to stay in the apartment when we visit the city next time.