Bodum C-MILL 5679-103 Electric Blades Grinder Review

I have gone through two of these in the past six months. The blade comes loose and spins without grinding the coffee. This has occurred with both machines. There is clearly a manufacturing flaw in this grinder with respect to how they attach the blade. I took it back and replaced the first one and the second time around the manager of the store told me that it was my fault for not operating the grinder properly. I have had other grinders of similar manufactur that lasted over ten years. I will never buy anything from this company again.