Nintendo's blurb says its line represents "the only refurbished products in the market that have been cleaned, tested, and inspected to meet Nintendo's high standards." Well then. The portables have a one year warranty and are guaranteed to work, even if there are any "minor cosmetic blemishes."
Alas, Eurofriends, it seems this one's a NoA thing. "We currently have no plans and have made no announcements for this type of activity in Europe," Nintendo UK told Eurogamer.