i've never really liked them, not for any particular reason, they just never did anything for me, test rode one once and wasn't blown away, then road a p7, liked it, bought it.
that was '96.(tested both where i work now)
1year later i was in the trade. 6 years later i got the job in the shop i run now, was a cannondale dealer, kicked them out 2 years ago and never looked back. they were very niche so it made them hard to sell to people who didn't understand them, headshocks and lefty's etc. even if you spent ages explaining the pro's of headshocks etc (and they do have some pro's!) people just didn't buy them, they went for something else instead that was more "normal" or better specced for the price.
i did much prefer the older ones though,
also full suss wise how many times can they make a single pivot bike with 130mm travel in a different configuration, super v's, jekyl's, prophet etc all single pivot and 5inch-ish. :?
also they were an aspirational brand but i think that companies like evans have innadvertantly turned them into a discount brand with their structured end of season sale system, and that will affect the image even if it's not deliberate. maybe hence the no love here for cannondale.
just my thoughts anyway.