i have the onza 3 shoots great, haven't shot the 400 !
2010 nemesis camo, 2011 nemesis carbon fiber,
2010 onza 3 camo,
the string stop wears cables quickly if you dont wax enough. but other than that its a ridicoulsy fast bow. i shoot threw double bales and loose inserts in the mat behind it out to 50 yards.
I did this a ways back. Owner has been buried at work and saying he will be back. Holding down two jobs will do that to you...Bury you....