I don't have a lot of experience rooting cuttings.. more often than not, I stick a cutting in a cup of water and that's the extent of my expertise
I've tried rootone a few times with varying success.. usually hardwood cutting, strip half inch of bark off, dip in rootone, put in soil, put in humidity. This method hasn't overwhelmed me with success so I usually don't go through the effort.
I'm wondering though... when I try to root a plant the easy way (in a cup of water), if adding rootone would help? Or if it would hurt? or maybe it's negligible
Thinking about it cause I have rootone just laying around unused.. maybe I'll try a gel in the future bc I've seen many here use it successfully