Yeah, I've haven't hear too many good things about Evosport on the couple MB forums I've been reading.
There have been many debates on the crank pulley needing, or not needing the harmonic balancer.
I know for a fact that I've haven't seen one complaint from any Renntech customers though.
I've also read that even though Evosport supposedly makes more "dyno" power...Renntech packages are faster with 1/4 mile times to prove it by many happy customers.

So...needless to say, my pcm is all boxed up and ready to ship out to Renntech first thing tomorrow!