Would be worth considering sending a course to GC by email?
My use case: I plan a course for my mates, send them GC link and fit file by email ... and (random) half of them are always lost, no idea how to get it into their units. If I could send the course directly to their GC accounts, they could only sync with their cell phones - work done! (it's like sending ebooks to kindle reader)
Or is there any really user friendly way how to share courses?