It works pretty good. @Pigeonman turned me onto it and has a video of it 🤯 Holy Carp! It's Pigeonman's 2023 OuTdOoRs ThReAd! - #438 by Pigeonman
It’s not as good as a hand trim, but its 10X faster. And it doesn’t beat the crap out of your buds like a bowl trimmer. Works wet. I’m really glad I bought it. I just don’t have it in me to trim all that outdoor anymore by hand.
Get the one with the grates running in a straight line like in mine. 
Theres another version where they run both ways and apparently it doesn’t work so well.
It can be dangerous if you had tiny fingers…which I doubt most of us do.