DSB

It can work, but the interface leaves much to be desired, as others have pointed out. It also tries to use a fancy location-tracking system to charge you for by-distance tickets, but it's unreliable. For example if you stop for a while in a station it may decide you got got off the train and finalize your ticket. You may then notice sometime later when a conductor nabs you for traveling without one. Finally the website blocks purchases from outside the country so good luck trying to prebook long-distance travel.

Interface is a train wreck. There are "x"'s indicating you can erase the field (say, when you are told amex isn't a viable card, slightly odd limitation for a national monopoly, so you may not think of checking the list first), except they don't actually do anything. No way to save tickets to wallet, you have to hope this janky app actually works when they come around to check. Why is a dob required to set up an account to save tickets for? It's ok to take money from an 11yeat-old, but not let them retrieve their purchases. This is all somewhat underwhelming, but fortunately not as underwhelming as their website which doesn't even work on iOS safari.

We were finally able to successfully buy our tickets after multiple glitches and considerable time spent with our bank and DSB representatives. Once the system errors were fixed it was easy. Hopefully in the future the bugs will be worked out.