At first i was skeptical, but they are my favorites now.
Do to my play style my plectrums always rotate a lot, no matter how hard i clamp down.
But now i can relax my hand a little and i can really concentrate on the accents.
They don't rotate at all, It's great to have more control.
The only downside i can see is that you will grind them down faster.
They will last 2 shows, maybe 3 or 4 if you use thin strings.
I use 52 through 11 strings, so that does explains the wear and tear.