I currently own and use one of these presses. I use it to load 9mm, 45, 300BLK, and bulk 223. I use a single stage to do my 'match grade' 223, 308, and 6.5 Creed. For comparison purposes, the only other progressive press I have personal experience with is the Dillon Square Deal B. The following comments are regarding the Hornady machine:
The priming assembly is really sensitive to dirt/debris/brass shavings/spilled powder. Must be kept very clean, which is a difficult task to do, especially when using ball powders.
I've had a hell of a time getting the case feeder adjusted to drop rifle casings with any measure of reliability. It does okay (but not flawless) with pistol casings, but when loading rifle it can give me a headache.
Those are my biggest complaints. They may seem like small complaints, but both of them can really be a downers.
I haven't had any problems with the powder drop. It can get a little inconsistent as the powder level changes within the hopper, but this wouldn't be Hornady specific. I haven't tried to load 'match grade' ammo on the progressive, as I still use a single stage for that. Could it? Maybe, I suppose. I remember running a powder test with Varget and seem to recall that it would throw to +/- 0.2 grains or so, which I think is acceptable for thrown stick powder.
I'm still using it, and haven't gotten frustrated enough with it to throw it in the trash. But if I were to do it over again, I would buy a Dillon 650. My experience with the Dillon SDB was wonderful. I think the Dillon machines are just all around 'smoother' machines.