Several folks here use one and swear by it. @JoJo has one, ask her too.
@Scottes777 I have one, used it for some time now, but not on e-juice.
I make tinctures [mostly for use on the critters here [my zoo] and many of them 'require' I make extracts using alcohol [vodka]. When they need to be applied soon after making, the alcohol can burn when used topically, so I use the Badger to spin the hell out of the mix and help evaporate the alcohol. It also aids in breaking up the herbs I use, and makes straining faster/easier. There is more to it than that, but you get the idea.
Personally, for me, it is too fast for e-juice, no different than a frother, or any other similar device/contraption......I like my juice mixed at a slow steady pace, with friction gradually adding heat to it. That's just me, and because I have mixed so many thick liquids the same way for so long.....and I am too old to change, eh?