I have them growing in my forest garden, as well as in random places on the property. The berries are edible, but they don't really have any flavor (to me). Most people I've seen use them made jelly from the berries (with lots of sugar).
If you want to transplant, I would do it during the dormant period. They can also be propagated by cuttings. I trimmed a bush back last winter and just stuck the branches in a
bucket of soil. They ended up leafing out in spring and are now covered in ripening berries.
I suspect you can
root softwood cuttings during the growing season, but I haven't tried because I don't really have a use for any more of the shrubs.