I have them on 3 of my cars, the flex a form is pictured. One set is hyperco, they appear to be higher quality. I had one leaf years back nearly brand new seemed to start to splinter very slightly from Flex a form, sent them a pic and they sent a new entire set, have the old ones sitting on the shelf. They seem to be an improvement, huge unsprung weight savings. They have been on old vettes for years and very HD versions are on Class8 semis.

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.