I own a '02 autococker with the E-blade system, added the Nexus kit and other components for efficiency, reliability, and love it. It's easy to maintain, don't have to break it down like the open bolt setups of other high end markers and is easy to clean.
Sure, it doesn't shoot like the Nerve with x-ball settings , Shockers, Angels with the ramping style boards, but with the added Samurai trigger, makes it easier to walk than the standard e-blade trigger for a slightly faster rate of fire.
For the Rookie, Novice player, should be a great upgrade to the Autococker and I would highly recommend it.
Now the Karnivore is another subject when it comes to rolling the paint. I would consider it as good of a marker as any out there. Bounce and ramping don't count btw.
The only con for the e-blade system is that you need to lighten up some of the moving mass of the Autococker. Change the pump rod to titanium or aluminum, all delrin bolt, Delrin or aluminum backblock, freeflow internals and these will lessen the kick, reciprocating mass substantially.
Misnblu