We have the MCF - the smaller, square one. It's about a foot tall, where the MDX is two feet. For a commercial situation, the full size commercial grinders naturally make sense. At home ... well, I have done a lot of things that didn't make sense, but in this case we really didn't have a place in the kitchen for something like a full sized MDX (or Fiorenzato or whatever.)
The MCF has smaller burrs, and some plastic, notably the doser lever. We've been using it for years, though, and nothing has broken yet.