Steven Kupillas left a comment about preferring a single stage press because, among other things, he's loading one at a time and looking in every case.
I agree with the looking in every case part. You can never just believe powder came out of the hopper. Never. Not with any powder delivery system.
If there were 4 Rules for Reloading, one of them would be said, "Every case is always empty."
If Moses had gotten the 10 Commandments of Reloading on the mountain, it would be enshrined, "Thou shall look at the powder in every case, least thou have a squib."
I have a small LED lamp with a flexible gooseneck. Whatever press I am using, I set that light to shine in the case where I look into it just before setting a bullet on it. I do this on every case.
If I'm using the single stage and throwing powder into rows of cases in a loading block, I pass them all under a light and look in each one before I set the bullets on them.
To do other is to invite Murphy to go to the range.