Helix do a ceramic and an organic lining versions which is what PSD used to sell, I think the linings are interchangable but might be wrong.
I've got the organic lined one on the basis it was meant to be easier to live with day to day and I honestly couldn't tell any difference at all in jerkiness or smoothness from a standard one but it's a bit heavier in stop start traffic, but only just.
It's done about 10k running 150bhp+ and no sign of slip, time will tell though I guess.
Bought it for peace of mind really...