I've had a Barley Crusher since 2007, and it's been a great mill. I did have to replace the rollers in 2016 but otherwise haven't had any real issues with it. However, I recently purchased a Monster Mill, and it is a huge improvement in build quality.
If you use a drill this probably won't matter much to you, but I usually mill by hand and it's huge: the Barley Crusher takes 51 revolutions to crush a pound of grain, and the MM only takes 28. It almost cuts the milling time in half.
Below is what the crush looks like with the gap set at .042. It's a lot less flour than I'm used to. I'm brewing with it for the first time today, so I'll have to see if efficiency takes a hit.
![](https://hosting.photobucket.com/images/ff164/narcout/crush.jpg?width=1920&height=1080&fit=bounds)