Greetings MAIMOMEDIC: A few things you may wish to consider. Many people who have their kitchen knives sharpened by others are primarily concerned with cooking ~ not knives. They want the knife returned to service quickly and at as low a reasonable cost as possible. They may be less discerning and more pleased by speed than quality. Many low to medium quality kitchen knives are constructed from softer steel. To the targeted buyer, a kitchen knife's stain resistance usually outweighs it's edge retention and carbide content. A shop familiar with the volume sharpening of soft kitchen cutlery, (not expensive chef's knives or Japanese knives) may not be fully aware of, or concerned with, the quite different requirements for putting a proper edge on a valued EDC knife, made of substantially different steel. If the primary reason you are considering having your EDC knives sharpened on a "grinding machine", at this shop, is the fact that they are conveniently located near you and they sharpen a large number of kitchen knives, perhaps you should look elsewhere. It would take less than five seconds for an unknowing or uncaring shop employee, using a "grinding machine", to really screw up your favorite Knife. On the other hand, they may do excellent work. If you are knowledgeable enough to evaluate their methods, equipment, experience, skill, and understanding, of which specific edge type is best for you, your knife and it's intended use, then let them do it. If not, you may be more pleased with the results obtained by either: Learning to do it yourself, sending it to one of the recommenced sharpeners on this forum or sending it back for factory resharpening. OldDude1