The reason why the knife is so magic is because of the holes
When you push the knife forward with very little downward pressure you push air into the food, so on hard food like swede and butternut squash you don't get a suction on the knife, therefore easing the effort you have to use.
We are a small husband and wife team. The Magic Knife in our opinion is one of the best knives you will ever use in the kitchen for all your culinary needs.
Come and visit us at our stand, where you can try the knife for yourself.