Oh my god. Just got the abyssus. Was using the G5 from 2006 - 2008, then DeathAdder for 1 1/2 years. IME 3.0 for over a year. So I've only had palm grip mice.
This feels so weird, but in a freaking awesome way, jumped into a game with 8 nightmare bots, hitting better LG and hitting so many rails, I can also ****ing rocket jump easy as piss now. No more looking like a ***got because I'm unable to rocket jump.
Best thing is, little to no jittering when so many people are reporting it.
Only problem is the highish LOD which is fixable with tape apparently.
EDIT: The LOD is actually horrible, I find it hard to play so I have to play without picking up my mouse til I find some blurry scotch tape or something.