In a recent article, Dr. Michael DiTolla discussed his experiences with this system.
"I have been excited since I first began placing e.max crowns because of how good I think they look. Because it is milled from a single block, I can take advantage of the benefits of CAD/CAM, and can dial in digitally consistent contacts, occlusion and anatomy. With CAD/CAM, I can make it much more consistent than was the case when technicians were doing this by hand. The low remake rate of the e.max crown proves this."
You can read the full article here.
-Eric P.