We bought our tickets for the Oslo to Bergen train. Managed to get a good deal by booking early. To pick our seats, you have to click the drop down arrow beside the time in the corner. We reserved two seats next to each other facing the way we like because we suffer from motion sickness, so it’s important to have that option. The website was simple to use, and we got our receipt right away via email, followed by a second email with the tickets to download. Everything went smoothly. I was a bit unsure after reading other reviews, but we had no issues at all.