I've got the HDE & done quite a few 1-3 hour motorway runs,they rattle a bit but once you get used to it have no problems even towing big heavy bikes,after initial strap down I check once I've done a mile or so.
Takes me about 15mins to assemble mine a hassle-less way of only having to tow the trailer home,plus easy to store in a garage cos it breaks down.
Good luck selling if not here try other bike forums,these don't hang about long (y)