The prestashop as good as it looks has still very little or no documentation and or ridicilously complex written smarty templ. stuff, driving us "open source" fanatics, like cattle into bottleneck traps forced to buy our way out.
Don't forget it's a company! they are even hiring at the moment. and we will be caught.
and imho, "open source" by a company?
reaping all the benefits of community development, organising predators and game refuge paths for a nice game hunting season.