I beleive its only pro road racing theyre not allowed. Even still you could use them without the blades & perfectly legal.
You don't want to run these without the blades...
That said, these are a dang nice wheel. Solid feel, very good braking, good stiffness.
They're not particularly good in cross winds, but then nothing this deep is... The mavic profile feels a tiny bit more reactive to cross winds than the firecrest (and host of firecrest shape copies) but it's not a massive difference. Really, if cross winds are a genuine concern, you need to run shallower wheels regardless of brand.
They feel fast... These sit at / hold speed really well.
That speed holding combined with good braking and solid feel are classic Mavic racing and the same traits that made the old school Cosmic's a favorite hammering tool despite the fact that there were lighter things to be had... The CXR's give you the same kind of confidence as the Cosmics... you're just not thinking about your wheels regardless of the conditions on the road... That they do it at a reasonable weight for the depth is just a plus.