I'll start this question with the caveat I have never ridden any of the plate systems described here. They clearly all work and I would certainly try one if offered.
To those who have, in the context of recreational carving only, what are your thoughts on the "bang for buck" factor? Given most systems retail upwards of $400 and add a couple of pounds (geckos excluded) would that money be better spent on another board more suited to dealing with crud, rather than trying to adapt your morning scapel into an afternoon machete?