I had a pair of these, rear one cracked around the spoke holes so had it replaced with a Fir Helix. Never wanted to fit into the Mavic crowd at the time.
The rims were bloody excellent, could set pads on XT wide profile cantis to stike rim and lip simultaneously. Stiff as a board, hence the cracking. The front one was snowflaked. Had it for about 5 trouble free years before bike was nicked by theiving scum.