CAD CAM is an amazing technology. It provides a better therapeutic result for patients, it reduces chair time and associated costs. On the other hand it is not a simple or easy technology to implement.
Inevitably those dental offices who are getting the most out of a CAD CAM investment have invested the most in training. Just last week I spoke to a dentist who confirmed that his use of CAD CAM and as a result his return on the considerable investment really took off once he pushed past the initial learning curve and took some advanced courses.
For CEREC users there are many excellent training centers. On of the best is here, in my neighborhood, at the Scottsdale Center. The link below is to some of the advanced CEREC courses they offer.