@herko-ter-horst
"...troubles with getting that information onto the GPS device..."
As I tried to point out earlier - the departure or duration information isn't being exported from MRA in the GPX files - so if you want it in the GPS you have to enter it from the GPS front panel. (Or, use Basecamp to read the MRA file and generate a proper GPS file.)
As to why it's significant let me give you an example from last year's riding season - I was riding back to New Hampshire from the BMW Performance Center in South Carolina and wanted to have lunch with a friend on the outer banks of North Carolina. He had both selected the lunch spot and also the time to coordinate with his own schedule.
Building the route with predicted duration times at breakfast and fuel stops and setting the restaurant as the trip endpoint gave me a reading on the GPS screen as to my predicted arrival time. It was updated continuously - if I was ahead of schedule I knew it and if I was behind I knew it.
Hope this is clear and if you don't use the tools on your belt the same way I do, that's ok with me. 🙂
Larry