Not wanting to piss on your bonfire, but I bought some Kysrium SL’s to replace some hand built Dura Ace hubs on Open Pro’s, quite frankly, the SL’s were crap in comparison. They felt dead, made cornering feel vague and all in all not that inspiring, they looked nice though. Add to the fact that when the spokes break finding replacements is a chore. Even worse was when the rims started to crack at the spoke holes (quite a common fault).
I replaced mine with some Dura Ace C24 clinchers, a much better, cheaper, lighter wheel that climbs, corners and rides way better than the mavics.