I rode in Premier class for the first time on a Eurostar train from Paris to London with my family. Some things surprised me about the first-class ride, such as the large seats and reliable free WiFi.

I took the Eurostar high-speed train from Brussels to London. It only cost $12 more to upgrade to Standard Premier, or first-class – so I went for it. Grace Dean/Insider My single journey, which I ...

I upgraded to Eurostar Plus for an extra $34 on a work trip to Paris. It wasn't as luxurious as premium economy, and the meal was mediocre. But cheap upgrades are frequent, and the extra space is ...