Yep! The draw back is the expense. And the main reason I think that there not seen on the street more often. Rocker gear went through the roof a few years back. Otherwise, it has long been my opinion that there worth doing.
MoPars equipment has always been really good, but a little pricey for the street guy to use. Your pockets have to be a little deeper and have the want/need to go faster in the street/track in order to step up to a W series head.