Was refused boarding from Amsterdam to Brussels because I should have checked in 1 hour in advance. This was neither listed on ticket nor notified in any way. Furthermore: 1) app is very buggy and often crashes during booking, 2) frequent travel programme does not work on many trips, 3) Corona refund policy has been very restrictive, often not working properly via website, and staying far behind competitors, 4) communications are often misdirected, e.g. I received an email "Since you are soon traveling to the UK …" whereas I traveled from Amsterdam to Brussels. I have had it and am scrapping Eurostar from my preferred travel options. The only good thing about Eurostar: their on-board staff is very friendly and helpful