I just mounted a pair on a set of Nox Carbon TL read rims and they weren't holding air. Well the stems are crap, so I ordered new, but I did a water test and the sidewalls are leaking? WTF? Now I see the posts with sidewall tears? Guess Sealant isn't really optional is it?
Oh and yes they were a HUGE pain to get on. Two levers and a lot of swearing.