The concept is great. Except that. After several uses, the system began to seize up. Curious, I decided to open the lid when the mechanism is. (!) Having researched the square screwdriver that allowed me to unscrew the 4 small screws, I discovered two plastic wheels that were beginning to agonize (!); normal thing because there was not a drop of lubricant to accompany the set. After cleaning the inside I put a little lubricant (not fat) for chain bike and after reassembling it was much better. Note again that this grinder is not guaranteed for life but 5 years. This seems very optimistic given what I saw. Finally, for the price I expected a more reliable good thing.
