I use one on my playing cue. It's the 11.8mm.
I think it's great, the construction seems solid and without detectable flaws, but I'm not necessarily the most sensitive to such things by nature.
What I am sensitive to is squirt, which is right on par with a Predator Z3, and juuuust a hair less than a Cuetec Cynergy (both of which I've tested it against). Haven't done the back-and-forth tests with a Revo or other CF shafts (although I bet someone has between the Revo and the Z), nor between the Rogue 11.8 and the larger-diameter Rogues.
Feel-wise, it's pretty well-dampened, particularly compared to the Cynergy which feels like it hits very firmly by comparison. I'm still on the stock Pechauer tip, which I'm going to change out for a Tiger Onyx sometime soon and see if the hit gets any livelier. The feel is a bit muted for my tastes.
That said, when I put a good stroke on the ball I get plenty of energy into the CB. I haven't done a power-shot back-and-forth test with the Cynergy or Z (and now that I realize this I kinda want to), but on longer draw shots I think I get at least as much zip on the ball as I did with the Z (which was my playing shaft for several years before this).
Anything else you wanna know?