I was so sick and tired of the supermarket grinders - both refillable and non-refillable. Tehy had limited, if any, means of adjusting the fineness of the grind and broke within a couple of weeks. After buying some spices from The Spice People I saw the Spice Gringer pack and decided to try it. I have to say it is the best I have ever used - both in quality of the product and the ability to adjust the grind from coarse to fine in whatever increments you like. Time will tell about it's longesvity but I feel confident that it will be far, far superior to the supermarket types.