My problem is I have very thick dark stubble. A weeks beard growth for a normal person is about two days for me. I have been shaving since the age of... Christ.... 11, and have also never found an electric razor that does the trick. My current one, which I don't use for that very reason can be run over the entire beard area for five minutes resulting in sore skin and no lose of facial hair. I use a Mach3 as well, and generally shaving gel as opposed to foam.
What gets me is that over the years, parents, girlfriends etc have always TOLD ME how to shave, but having such thick growth it grows in all directions so something that my dad and brother have no problem with is to me like trying to shear through weeds with a flick knife! Not everyone is the same. Not that I've been out with anyone who resembled Geoff Capes you understand. Now, wait... there was that disco with the bad lighting... sorry, where was I?
I remember a patient opposite me in hospital who shaved with his electric razor everyday even though his face did not seem to have the remotest bit of bum fluff on it!