I have access to one in 9mm, and it's great until you skip a primer or get some range trash brass with a mushroomed primer.
Powder in the works if you skip a primer. I took to keeping a straw on the bench to blow it out of the little ratchet thingies on the shellcase base.
Mushroomed primers gummed it up horribly. The *same* hole in a slider used to feed the new primers is also the hole the fired ones drop out of. That's the biggest design mistake, IMO.
I thought I liked the ability to pull two pins and disconnect the primer feed (skipped cases--rare enough to keep me happy), until I found one batch of ammo with at least 6 duds. Really thought I was being careful on that.
There's a routine of watching and listening to the primer feed and case feed components, putting your finger over the charged case's mouth as it advances, dropping the bullet in the neato side-loading seater die, and feeling for primer pickup jams on the upstroke that makes it very satisfying when it hums along.
I can easily do 200 per hour including loading the casefeeder and the primer feeder with a typical number if hiccups, and 350 per hour when it doesn't hang up more than twice per hour and the jams are quickly cleared.
When humming, it FEELS nicer than the Dillon 550, and almost as good as a Star. Use both of those, too.
The Green Machine even worked great with some Fiocchi cases that has super-small flashholes that were being swaged bigger by the decapper pin.
It's just not a machine for mechanical idiots who just push harder when something gets a little stiff.