I have never used one, that being said I don't believe it is a good fit for homebrewing. While i'm sure it will work, not so sure the KA mixer is really designed for and would be happy crushing 10 - 20 lbs of grain on a regular basis. Burn up wifey's mixer and your in the dog house for sure! General consensus I have read here is that it is a lot of money and not ideal for brewing. Buy it for cooking and buy a Corona for brewing, Just MO.
Sorry to be so negative, but I have never heard any praise for these mills regarding crushing grain for brewing ??? Of course, YMMV
Some reading here...