Many claim this die is not reliable in returning actual bullet seating depth to indicated depth markings on the seater micro dial. They also say that the adjustment of the micro top feels sloppy and unreliable. I have one and can conclusively say that it is sloppy compared to a better quality micro adjustable click die like the Jim Carstensen die.
Fair enough. The mic top I have is the older design and from lathe experience I guess I use them assuming there's going to be some backlash. In which case the accuracy is good or least good enough for a lowly factory rifle shooter.