If you take a new Lee seater apart and debur and smooth the high spots and use some bolt grease on the camming and contact points it will last a very long time.
Clean and lube once a year is not a bad idea.
I really like my K&M, never used anything else, never felt the need to get a "better" one.....
My problem is that arthritis is getting into both my thumb joints such that I can no longer seat primers with one hand & when I use two, I lose the sensitivity to feel the primer in. I can see that the Forster coax has the potential to give me the leverage I need to seat, but how is it for sensitivity? Can you feel the primer bottoming out?