Really? My bf's S2000 has S.Techs and it lowered his car just about right (actually a little too low IMO, especially up front). You sure they're authentic? A lot of knock-off/wanna-bes out there from what I hear.
Anyhow, I'd probably have to say I regret buying APR CF side mirrors. They're a decent quality product and company and they looked great, just a pain to keep adjusted just right, plus they warped my door skins (just the area where the bases mount, which I did manage to bend back but they're still not perfect). Ended up selling them and putting the stock ones back on.