I just bought one but have'nt used it yet.(tomorrow, most likely) It does, however seem to be a very solid, well built machine. It comes with a crank handle, or you can use a drill to run it, plus it's adjustable. A good value as far as I can tell.
Well I went ahead and milled my grain tonite. Worked like a charm with my cordless drill. So after one use I gotta say that I highly recommend the Barley Crusher.
I have one too, its the best thing I did when I went to all grain brewing. I have adjusted it a little bit for a finer crush after trying it a few times.