I was playing with it a bit on some new tires a few weeks ago. It seems to work OK, but is lacking on “bite” via sidewall engagement and slipped on a really tight tire. I ended up using the hair dryer technique to warm the tire for easier fitting and finished by hand.
I do think it may be a tool that can work in some cases, but is somewhat limited in ultimate function due to it’s smaller size. I have a full-on bead jack that I can use, but I still avoid that on carbon rims, and muscle with hands in those cases.