Coarse, thick, and dark - I have a typical Mediterranean beard and skin. It's not sensitive but razor bumps still occur, however infrequently. I shave north/south then oblique (diagonally) and then with wet fingers by feeling the missed stubble. I envy those who can just shave south and get a close shave. The Mach III would irritate my skin 3X as much because of the 3 blades and still not get a close shave.

-Rob