Beware of the glass bowl!  After many years of usage, I did not lock the glass bowl in place and started the machine.  The glass bowl exploded from the contact with the metal mixer accessory.  My hand was sliced by one of the chards of glass, and I needed 14 stitches.  There should be a safety feature that prevents the mixer from starting if the glass bowl is not locked in properly.  Had I known the risk, I would never have purchased a glass bowl, and instead would have purchased the stainless steel option.