I am finding out (w/blood loss of course) that my chin, below the corners of my mouth and moustache area has got to be the roughest to master for me anyway. Cheeks, jawline and to some degree the neck has been descent shaves. Around the neckline I have to be super careful, tricky area for me. Maybe I will get the foreign grip angles, ecspecially on my non-dominate hand down pat before senility sets in