I'm booking tickets to get us from Paris to Leiden next October. I have a few quick questions:
The Thalys only goes as far as Rotterdam on the route; can I book Paris-Rotterdam and Rotterdam-Leiden on the same ticket? I can't see how to do that. We did this same route in 2018, and it looks like I had to book separately.
If I book the Rotterdam-Leiden separately, do I need to reserve seats? Even if I don't reserve seats, should I buy the tickets in advance?
Are "Comfort" seats on the Thalys worth the 50% surcharge? I know that's a very individual choice, but what is your experience?
Thank you.