I spoke with an installer recently who surprised me by telling me his newest, most 'game-changing' tool on his van:

Little Giant Adjustable Ladders

This surprised me because I had only heard of Little Giant from those cheesy infomercials. (Marketing usually reserved for ultimately worthless or junk gadgets.)  eg:

Despite the tagline "Just when you thought a ladder couldn't get any better!" (yikes), this installer told me with enthusiasm about how this one ladder has taken the place of three others on his truck, that it is lighter and more sturdy than fiberglass types, and that he unloads one ladder per day rather than repeatedly swapping them out at his van.

For those with firsthand experience with this ladder or similar 'multi-position' adjustable types, do they live up to the hype?