I haven't tried it as a root stimulant, Noel. I use the Quick Start for transplanting. Only use the Superthrive on my orchids as a foliar spray, but it says on the label you can use it as a rooting/ transplanting solution. It has hormones and vitamins but no fertilizer. It's also very expensive - as you can see the bottle is quite small, 4fl.oz. But it's very concentrated so you only use a little. It's one of those things that you really don't know if it's doing a thing, but once you start using it and your plants are successful you're afraid to stop.
Other than the huge ones already in my landscape, and some Caladiums, I have only started with Aroids a year ago. My only Colocasia 'Blue Hawaii' - new last year - has so many pups now, I don't know how I'm going to pry him out of his pot! Maybe when I do, I'll try the Superthrive on them. But it sure doesn't seem like they need any help.