I tried one, wasn't for me, seemed a bunch more wobbly than a ladder, but yes, you can cover a bigger area with it.
Ended up getting a pro model from the local rental house. You could hold a dance on that thing and I don't think it would rock or wobble. It also had big casters, like 10" or 12" high that would roll easily on the driveway.
Ted 'n' Laurie, plus Jackson (aka Deputy Dog, the Parson Russell Terrier 'fur kid') and, Rylie (who crossed the Rainbow Bridge June 14, 2012).