How safe are mandolin slicers?

The mandolin slicer was developed by Andre Jaccard. It allows control over the texture and size of every cut. It's like running your food through a knife instead of running a knife through your food, It slices attractive, uniform vegetable and fruit slices, as well as garnishes.

Cucumber man, are you sure....... I can dazzle you with my cooking and I throw a great party!