A little late on the response here but it's essentially just an add-on for the GUI (User Interface) for SUM3D. It has all the same capabilities but will save you time in nesting / processing. I've personally used DentMill and I can tell you it is not so similar since we have quite a bit of automation that does not for example require finding the margin manually and many more other items. The workflow is quite simplified but it still uses SUM3D underneath for the calculation so for technicians with little to no experience or just to save time, it could be a pretty great benefit. If you'd like to arrange a trial, I could set that up with you. Feel free to PM me. At this point, it would be after Thanksgiving.