I'd still like to hear from somebody with direct experience with a Trailer Valet. My experience with a cheaper version was not good.
At $900-$1200, the powered movers are a bit rich for my taste. For that much money, I'd be more inclined to a) take a welding course, b) buy a welder, c) make one from scratch using a winch motor (as demonstrated by I-can't-recall-who around here or fiberglassrv.com).
2013 Escape 19 ("The Dog House") , 2012 Nissan Frontier