The Wonder Mill is a good mill. It is quiet and has variable settings for flour.
The older version, The Whisper Mill had a lifetime warranty, and went out of business.
The problem I had with the mill was the green color, if your kitchen was not green. Also, the fact that if you over-filled the hopper or used grain with a high moisture content, it would clog the tube between the mill and the separate hopper which holds the flour. They would repair this for you, but you still had to pay $20.oo in shipping!
When taken care of properly, people have loved this mill, but if your children help make bread, like mine do..... well you cannot afford a mill that cannot take some abuse!
(With 3 boys in a row, I even had BB's in my mill when I turned in on one day. It was exciting with sparks flying- but I lost the mill!)