I've seen those for sale a number of times, and I always kind of roll my eyes at them. Mind you, I also used to roll my eyes at electric screwdrivers, and I have two of them now, and have had more than a few of them over the years, so what do I know?
As I start to develop wonderful things like carpal tunnel, and see how it has really affected my father I start to appreciate these kinds of tools. Dad loves his SOG because of the Compound Leverage just like I love my electric screwdrivers. I have to wonder if we wouldn't both benefit from one of these, although I would hope to find a decent one.... unfortunately though it doesn't seem like the companies that make serious" tools don't seem to have much interest in making one.
Def