I played a little bit in it. It was buggy, and crashed commands constantly. I don't think i had a solid install. When I got the rep on the phone he got it working through webex.
pros
1. it's vertical in a friendly familiar interface...autocad.
2. Most of the elements lacking in revit can be done in DM.
3. Easy to learn.
cons
1. exporting to a BIM enviroment doesn't produce data driven elements only solids.
2. Trying to coordinate with other trades in revit. you have to export a Arch model from revit and import into cad enviroment.
3. Performance of machines in 3D rich (sold, polyface) enviroment.
3. interoperability.
4. Autde$k is a monopoly and revit will be "the" program.
You may disagree, but you can only deside for yourself. Play with it, you may like it.
"It's hardware that makes a machine fast. It's software that makes a fast machine slow."