I got one on my car about 3 weeks ago after seeing my buddy's stock one go off like a bomb. I got mine for about 700CDN from Magnus. Great piece, really free'd up the rev's to.
They also make a 16lb (stock is around 19lb) steel one for those interested in a SFI approved lightened flywheel that will not make launching harder or inconsistant compared to the ultra light flywheels.