I got one from eBay about 2 years ago. I hate it. It does just a good enough job to not replace it. The shaft came bent, which isn't that big a deal, except it really shakes when I hook up the drill. The knurls are way too fine - I have to mill 3 or even 4 passes sometimes on progressively tighter settings just so it grabs the malt. Cleaning with a wire brush helps... some. But, I generally brew low gravity and or small batches, so my frustrations rarely go beyond 8-10 lbs of grain.
All that is to say, HAVE FUN!