I use the Primal Rights CPS. Uses Dillon feed tubes, has amazing feel and has great mechanical leverage which is good for my bad hands. It’s also really fast once you get accustomed to it.
At some point when my hands start to decline I'd like to get one of those. For now I like the 21st Century.
Just like to point out that the Lee feeder on my 21stC broke, I called Lee expecting to pay for one but they sent it for free! That was cool!
The other hand primer seating tools I had in the past fell short, well that "old Lee" wasn't too bad.