It didn't take long to figure this razor out. And, I'm extraordinarily pleased with it. As always, everyone's face is different. But, I have areas of very light growth and areas of wiry growth. For me, 2 passes set at 5 followed by a pass set at 9 (OK 1/2 pass) over the wiry areas was the magic. And, I can see where differing situations might call for other settings - say, for instance, a sunburned face or a second shave of the day. Or mowing down a weeks worth of stubble. I'm now definitely sold on this razor and it's a keeper.