matter in what sense?
i had them a while and they've sagged to a low height. i haven't seen a set of aftermarket springs that haven't sagged over time. i don't think they'll sag any more than that though. for me, i like it low, but i don't like it that low. others love it so it's personal taste.
at they end of the day, they are just springs. can't see much that could go wrong with them.
won't lie to you though, if you have the cash, you're better off getting a set of coilovers like i ended up with. but if you just want looks, this is a cheap way to go.