Well, we've all heard the saying "you get what you pay for"
I'm not sure what his prices are on pistons, but if it means saving a bore/other engine damage I would rather shell out 70 more dollars to get a trusted name brand.
I would'nt mind running a cheaper piston as long as they are good quality pistons.
Not saying his products are garbage, I have never purchased or ran any of his stuff myself.. I do think I remeber the thread a while back where he was giving them away for free, or at least really cheap?