I never experienced numbness but I sometimes feel 'phantom' hair blowing with a window down if I've let it grow a week or two then shave it clean. I always end up checking for missed spots even though I know I got it all.
I experienced a little numbness at first and thought my head felt like leather... and wasn't sure about it.. but I got used to it. I used to like the stubble, though.
Also, before I started shaving or even buzzing my hair, the hair on in the front was the first to go in my balding process. For quite a while, I used to have what I called 'phantom bangs' that used to drive me crazy! I'm glad that went away.
Adamski, you're looking great! I'm glad you have had such a positive experience so far. I'm sure you will continue to get this reaction, as the look suits you.