So after driving it for a week, the drone is noticeable between 1800 -2300 rpm. It's not horribly loud - but a noticeable volume difference in that zone.
Overall the aggressiveness of the system is medium. Not raspy or racey - more of a deep gurgling tone with medium volume.
I'd do it again.
If anything - i'd like it to be louder. HFCs would do it. But the install looks like a pain and I hate smelly exhaust...had enough of that with the vette.
During the install, I turned on the car with only the Xpipe installed. I was shocked how quite it was. Those cats tame the tone remarkably. Not quite like the open headers of an LS6...