Wasn't expecting much from a kickstand, but rolling my loaded trailer around the driveway one-handed sold me. The wheel takes the whole weight so I'm not dragging it anymore, and it folds down out of the way just as easy.
Bolted this on before a 300-mile haul and the wheel rolled the empty trailer around my driveway with one hand. At 5.5 lbs it's light enough that I barely notice it folded up, but it still holds firm when the trailer's loaded.