anyone used K1 tech cranks from campell enterprises

hi all,

looking at different options for my 318 turbo, considering a stroker crank, theses seem to be the best bang for buck, but are they any good?? anyone used one??

http://www.campbellenterprises.com/...roker-crank-5.2-forged-stroker-crankshaft.php

cheers
Ash