If you book a pre-assigned seat in business class on a high speed train, explicitly Trenitalia, are you guaranteed to be able to use those seats when you board?
I ask because I saw the following comment from someone on another social media site and wonder how true it is?
From another site: "We paid for business class and there were not any seats once we got on train. People sat wherever and no one on train checked tickets so we had to stand both way… it was a waste of money".