I like the grinder, but the edges are pretty sharp. The main problem though is the plastic lids do not fit, they are a least a millimeter too small and don't stay on the bowls when grinding. This poor fit causes the spices to go all over the inside of the grinder and not stay inside the grinding bowl. I like the machine so I will try to find a thin O ring or something to make it work rather than tapping the lids on.