Two “official reviews” from people who have spent time on different rockers and the E-Flex.
DC Rainmaker:
Zwift Insider:
My review (linked here, but found way up in this thread).
Chad McNeese:
In stock form, the E-Flex is quite different from other Leverage Input rockers. See my post (super lengthy, sorry) and the one from Zwift Insider (shorter and touches on the same points I make) for some comparisons.