Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Noisy, weak and ineffective

I purchased this grinder to replace my 20+year old Braun whose cord had come apart (it still works). The smaller Braun can easily grind a 12 cup pot, fast and effectively. This machine on the other hand is quite a bit larger and when I attempted to grind enough beans for a strong 10 cup pot, the blade quit spinning several times and after enough fooling around it chopped them up, but one could hardly call it a ground bean, it looked more like grass clippings.I doubt this thing will last very long after watching it literally stop working with a full load of beans to grind. I now use it for a small afternoon pot of coffee, half full of beans it will eventually produce a "ground" bean product. Another annoyance is its shape, difficult to hold on to especially early in the morning if you happen to have a touch of arthritis.NOT worth even the $13 it is advertised for on here.