Mavic has made some good wheels in the past. On the whole, they may not disappoint with the new R-Sys Wheelset.
However, I also don't see much point in its carbon fiber spokes. Something more controversial is their cross section. A bicycle wheel typically has 24-30 spokes and while in movement they churn the air. The R Sys's bigger and rounder spokes depart from the norm in thinking about aerodynamics. What you end up getting is an expensive but stiffer wheel which eats a bigger percentage of aero drag than its cousins.
Chris pointed me to a Mavic wheel "explosion" after a crash during Stage 1 of the Tour Down Under. This bike was ridden by Karl Menzies. Notice that the wheel has detached from the hub and the spokes jut out in a unique fashion. I wonder whether low spoke tensioning had anything to do with this. The wheel doesn't appear bent but its hard to see from this angle.
The photo was probably taken while the crash was happening (with a broken wheel before rider touches the ground) but the more optimistic of you might say that he's beginning to get up on his bike. Does anyone know how the crash happened?
I hope these riders are doing fine and back on their bikes. Human life values more than any combination of metal, nuts and bolts. Again, I'll take it that these types of failures are rare and the wheelset won't upset most people if rode safely.
UPDATE 1/13/2009 :
Take note. Front wheels of Mavic R-sys have been recalled as of Jan 5, 2009. To read more, click here.