I use a knife, it's cheaper and i get a closer shave.
All this bs about irritation makes me wonder if they got faces like i have balls, i've had to have them shaved once, she (the nurse) used some kind of white standardised razor, it irritated the shit out of my scrotum for days, i'm not sure how she would react if i told her to use a damn vibrating razor though.
I'm serious when i tell you that the vibrating shit is just a gimmick, it doesn't really do the shit they show you in their graphic cartoon videos, in fact, it does absolutely nothing but make the razor more expensive.