I used a Lee round tray for 30+ yrs, one for sm and one for lg, probably 35-40k rds worth. Splurged and got a 21st Century for Lee rd tray around 2009, good unit, should have bought two. Had to get one that used shellholders as Lee or 21st would not accept a 450-400NE rim diameter. Grabbed a Hornady as it was handy, piece of junk, QC was absent that day, saw others with same problem later in time. Tried an RCBS, had to use Hornady shellholders, RCBS ones wouldn't fit over the nub, apparently QC was absent there that day, worked OK, but stayed setup for that ctge as I didn't want to fight with the shellholders, and they were a struggle. Tried a Forster bench unit, OK, but I kinda wanted to have adjustability again. Tried an RCBS bench unit on a cheap deal, didn't like it, didn't like seating adj or the movement of it, lots of ways to fix, but wasn't impressed with springs and rubber band fixes. Could have bought a Holland kit for it, too much money and I didn't much like it enough to spend that on it. Tried an FA, too heavy and I didn't like it ergonomically, didn't fit my hand.
Started losing hand strength after retiring, need to do something different. Refuse to handle individual primers by hand, so, Sinclair, 21st, etc were out. Kept seeing stuff on Derraco, finally broke down and bought one, not cheap, but not Primal Rights type expense either.
See the Hornady bench unit out there now, and the Lyman autofeed bench version, don't much like the Hornady, it's another copy of a different older one, and it's overpriced. Lyman is good from all accts, asked a few people who bought them what they thought, they liked it, worked properly and easily, they'd buy again. FA hand unit is OK if it fits you, RCBS is better ergonomically for me, universal is OK, didn't like the way brass cocked on initial seating of the primer. I tried a new Lee handprimer, it was a puzzle, could not get it to feed, multiple tries at it considered it a lost cause, which cancelled out trying their bench unit too. I still have 4-5 old Lee rd trays, the 21st and the Forster, can also use the Co-Ax or Rockchucker if desperate. But, the Derraco PCPS is a really well made and intuitive unit, well worth the loot. I can use it at home on the presses, or at the range, on a Lee hand press, or others.. Would like to have had it a lot of yrs ago.