IMO lazy jacks work best with full batten mains and only if the sail is being taken down fully luffing head-to-wind.
Our lazyjacks routinely impede the dropping of the sail (not full battened). The only reason we use them is to avoid scratching the (expensive) Lexan windows in the dodger.
Another negative with regular jacks is the chafe on the sail and the difficulty they cause with sail covers. The EZjacks address this by stowing them when not required. Given the cost one could easily replicate their system with some line, shock cord and a few fittings.
We have addressed this issue by having the lower section all shockcord, and stowing them off the sail/boom to a handrail when not actually dousing the sail.