I shot the Z7 yesterday and it's definitely the smoothest pulling hunting bow I've ever drawn. It reminded me a lot of the Switchback XT. The bow I pulled back was maxed out on 70 lbs. limbs and it didn't feel any tougher than 60 lbs. I'm thinking this reverse assist roller is really helping out there.
It looks a lot cooler in person than it does on the net also.