Fine little hotel, but not 4 stars worthy. Nothing extraordinary. I travelled as a single person and got an upgrade to a 14 square meter room. I think the upgrade was going from a 120cm wide bed to an 140cm wide bed. The minibar was filled the first day i was there. Only some water. Be carefull there are no place you can read the prices on the stuff in the minibar. Breakfast has its basic things. No panncakes/waffel. Nothing special and nobody ask if there is anything extra you need.
This is how i would expect from a 3 star hotel or lower. Simple, works and nothing extraordinary. So were the 4 star comes from i dont know.
On the positive side, its really close to a metro that works simple, 15-20 min later you are at the most inportant places, the rooms are clean, good but very low beds, 200 italian tv channels and maybe 5 non italian tv channels and the bathroom was clean, everything works and good soap.