I don't use one. I don't like the idea of sticking a motorised device into any of my orifices. How would I be with my shaky hands? I am sure I would take off the skin from inside my nose. No, I prefer the old fashioned way, plucking. I stand in front of the mirror and pluck away and I've been plucking for years, since I first found hair growing in unwanted places. I consider my plucking works better long term too. I had a small hairy mole on my shoulder and for years I plucked and plucked and finally I killed the hair. I still have the mole on my shoulder, and there is nothing worse than living with an obvious mole, but at least it no longer needs frequent plucking.
Apparently for some Asian people it is bad luck to pluck a mole, but otherwise Asians do a lot of plucking. Some Asian people use a special plucking device that is both effective, but also a painful plucking. It is some sort of cotton on mounts that rips hairs out. I don't think I would like that sort of plucking. I don't mind plucking but I don't like extreme plucking.
I have yet to hear the verdict about the new grooming device. No matter what it is, I will just stick to plucking. I pluck early and pluck often.