Definitely one-sided, like a sushi knife. (Angle on the side away from you, depending on if right or left handed)George, I recall you mentioning the Knife taper......... was it a single edge worked best? (Sharpened on one side only), or was it a conventional edge worked best? (Both sides of the knife sharpened)........
In fact, I ground a single-sided edge on a $25 Victorinox 8" chef's knife, and use it 90% of the time for everything except large quantities of "bacon strips" from a plug. And... it works far BETTER than either the guillotine slicer or a half moon slicer for rope.