Definitely part of the appeal is that the bender does both bends at the same time, with both shoes fixed on the same plane, eliminating the chance for dog-legs. It's a clever idea, for sure. With every other mechanical or hydraulic bender, you have to flip the pipe over and slide it through for the 2nd bend. Still, with practice and a "no-dog" level, one can get good at bending all sizes of EMT and rigid. I think the opening sequence of that video, with the big junk pile of 1/2" conduit is sort of an exaggeration--most electricians with a little exeperience can learn to bend pipe consistently on a hand bender or mechanical bender.
