I've only had my DF64V for a few weeks, having run about a pound and a half of beans through it. I didn't break the burrs in with a few kilos of cheap coffee as, I'd rather endure the break-in than waste the hard work of the pickers.
So with the combination of some burr break-in and getting to know my beans, I'm pulling some great shots.
I can't speak to random comments about stalling, as I consider that to be misuse of the grinder (i.e. light roasted beans, ground at 800 rpm for espresso).
I've been grinding medium light beans at 1200 rpm and my shots are coming out predictably.
Noise was a concern, as it's difficult to get a handle on noise from the YouTube reviews, but I'd call it minimal, but high-pitched (when grinding). When not grinding, I have to feel the case for subtle vibrations to tell if it's on.
I find the bellows to be useful, unlike most YouTube reviewers. I'm not sure how much the ionizer works, but with with a couple of RDT sprays, I'm consistently getting from 17.9 to 18.0 g out when loading 18.0 g.
I love the magnetic chute. This is a brilliant idea!
