I used to BIC my head everyday. Just got to be too much. Those blades for Mach3's aren't cheap. Then if ya miss a day it's a pain in the ass. I also have too many lumps and scars on my head now. This makes it very difficult to shave myself, especially on the back.
I loved the feeling though. It's like A/C for your head. I wonder if they wax heads anywhere and how painful it would be?