I've had success in the past printing and cutting the .020 Magnum DigiMag on a VersaCAMM SP300V. The print quality was pretty good, but not as good as the regular vinyls. And cutting required several slow passes, enough to score the material that would be broken apart later. I must say the machine did not sound like it was having fun, even though I was running only a few feet of magnet at a time and cutting pretty slow. My machine was old so I was willing to risk the benefits of die-cut magnets, but I wouldn't try to do it on a new machine.
Steve