I just purchased a Co-Ax last Fall and happy with my purchase, the Co-Ax replaced my Herters 03 super press place on the bench.

The Co-Ax is a very smooth operating press, I like the jaw shell holder design, which makes changing cartridges fast and convenient for me. What drew me to the Co-Ax is the design, with the die to case alignment design.
I was a bit concerned about jaw shell holder change over, after reading some experiences. After my first Jaw shell holder change over to large for the 45-70, the change over seems pretty simple. I just changed back to standard jaws, and took all of 2-3 minutes to make the change back to standard.

I still do the majority of my sizing on a couple Dillon 550's and a 450, as well as loading all my pistol cartridges, 223 and 308. All other rifle cartridges are now loaded on the Co-Ax.