We have an 892 in the Shark CNC where I work. I agree it's a great router for that application although the collet lock broke early into its life. I have an unused Dewalt 611 on hand, and was playing with the idea of putting it on my Shark. The bug to get the larger CNC left that idea cold, so I'll start with using it on my Meteor. My Shark uses a Bosch Colt trim router, and it could cut anything I threw at it. Sometimes it just took a few more passes than the 892 would have. It looks like Probotix will sell me a mount for the 892 down the road if I want to upgrade. I can probably make my own as well.
I doubt EMC2 will give me much trouble. I've had my Shark for 3+ years now, and with my 30+ years of CAD experience to pull from getting up to speed on it was nearly instant. I will be calling Probotix if (when?) I get stymied though.
I teach college Interior Architecture students how to use the CNC Shark. They are clever kids and most have it running with their own projects in short time. People vary widely though, and I've met folks who are confused by what a vector is. The other end includes 20 year old novices that teach me new things the Shark can do each semester.