From personal experience the competition clutch ones are rubbish,
I had a stage 2 (ceramatalic 5 blade plate) one on my dc2, it lasted until the engine was run in about 200 miles, and then while mapping the engine on the A3 the cover plate let go at about 8000 rpm, result destroyed starter motor & holed gearbox casing where the springs flailed around inside the bell housing.
Suppliers answer, never seen it before mate, must have been a dodgy one here's a new one, fitted to car, took for mapping session all seems ok.
300ish road miles everything still ok, enter first sprint event, 2 practice runs ok, 1st timed run dump clutch and bang no drive, pushed back to pits, go home.
Remove gearbox find cover plate has exploded again, that was October I'm still awaiting an answer from supplier, who keeps fobbing me off saying he is waiting for competition clutch to give him a replacement kit.
In the meantime I have fitted a used but good Oem cover to a AEM bladed plate and so far no problems plus as someone has already said the pedal feel is much better, previously the pedal was too light and feeble.
By the way engine is about 230hp, crower stage 2 cams, steel rods, JE high comp pistons, jenvey Itb's, MBE ecu, wasted spark ignition coil.
Tony