"If you needed hair, it would've been issued."
it's a fine product for extra close shaving- my "whitewalls" have rarely been so smooth. I've worn a shaved head consistently for 5 years and, before that, military white-walled haircuts for decades (yes, I was that S.O.B. with the well-maintained horseshoe flattop that reminded everyone "that high & tights are back in style"). I have a well-shaped head with a bit of raised terrain in the upper rear where the skull plates meet. I've pretty consistently cut myself with your product there, minor bleeding rather than gashes or nicks, and noticed the results are best when I use patience and care with my technique which requires some extra time.
For those accustomed to Gillette multi-blade products which can be used quite safely with speed, there will be an adjustment, but the blades have a lot of wear- I have had 6 good shaves with the same blade so far and plan to re-use it again. All in all, a very smooth shave but don't rush- it's important that the roller ball has the correct amount of pressure and contact to your scalp.