After trying a dozen, he came away with five favorites, one of which is the Philips Norelco OneBlade (which, we’ve heard from other guys, too, is just great). And today, it’s on sale for just $17.

While some of these new, innovative designs have proved impressive (looking at you Philips Norelco OneBlade), many fall into the trap of looking cool, but not really being functional—or ...