After almost 40 yrs with a Lyman Orange Crusher, decided to try out a Summit. Had it for awhile. The tool has a lot of moving parts on it. There is a sweet spot somewhere too tight and too loose when tightening all of the lever connections to smooth operation and reducing the play in the mechanisim. I took the whole thing apart and lubricated all of the moving parts. Some were lubricated, some not so much. The one I had, the shell holder wasn't perfectly centered on the die. The press required more pull on the handle to size large magnum cases than I liked. It was tiring to use for them.... that said, didn't notice much difference with sizing short action non magnum cases. Sent it back for a refund and purchased something else.
Others may have had better experiences, wasn't for me, went another direction.