I've got the Lee auto-disk and a Hornady LNL measure. They both work just fine with every powder I've used that wasn't "stick" powder. With stick powder, the Lee works better.
Two tricks to get the auto-disk to drop consistently:
1. The first drop you make after filling the hopper should go right back into the hopper because it's usually heavier than anything you'll get going forward. Do the same thing if you re-start your loading process after taking a break. If the measure sits a long time the charge in the disk will compress slightly.
2. If you use a disk, or disk combination that you haven't used before, run half a pound of powder through it before you load with it. That seems to solve any static electricity problems that could lead to inconsistent drops.
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