If it hadn't worked so well for me, and my very specific set of variables, I would have chosen to lose the Powder-Check and keep the Dillon Seat Die and the Lee Factory Crimp Die. But... It works for me. And as a favorite NCO of mine once told me, "If it's stupid and it works, it ain't stupid." I like the GSI, but I wasn't able to (in first person) see any working during my decision process. Several of my friends have the MBF, so it was an easy choice.