Published April 1, 2006.
Pretty good isn't good enough.
The Magic Knife ($14.95) promises "perfect slices every time," thanks to an adjustable spacer attached to a serrated blade. To find out if the Magic Knife delivers on its promise, we tested it in four applications: soft wheat bread, crusty French bread, a large potato, and, as illustrated on the package, a ham. The knife performed well on both types of bread and did an admirable, if not perfect, job slicing a potato into paper-thin rounds. The knife (which adjusts from a few millimeters to 1 1/4 inches) was inconsistent at the thinnest settings, sometimes producing ragged shavings. The short 6-inch blade didn't stand a chance with the ham (contrary to the package photograph, which likely features a very small ham). Our conclusion: The Magic Knife ensures pretty good (not perfect) slices on small items only.