In uk.railway Someone Somewhere wrote:
Great - yet another train service clogged up by people who have the
luxury of planning things in advance.

Does HEx ever get 'clogged'?

Seems like a cunning plan to lock people into paying long before they
discover there are better cheaper routes, and to prevent them making the
decision on the day.

At least they don't tie you to a given train. Though 6.99 one-way 90 days
in advance merely brings them into the land of 'sanely expensive'.

Theo