I have owned a Co-Ax [an original, built by Bonanza] for a long time. I consider it the best press ever designed,period!! Aside from the caveat mentioned [longer than normal seating dies], there is nothing any other single-stage press can do that a Co-Ax will not do better. Dies are quick change and self-aligning. Shellholder jaws only need changing for some very obscure cases. Powerful leverage system, excellent spent primer control, strong, etc,etc.
Can be used left or right handed, too. I have three presses mounted on my reloading bench, but the Co-Ax gets the lion's share of the work, and has never need anything besides a periodic cleanup of powder/primer residue. How many loads it has produced is anybody's guess! Highly recommend this press. REgards, Eagleye.