They are on my Ti road bike and replaced some 6-year old Velocity A23 pro wheels that cracked at several spoke holes on the rear wheel. I wasn't interested in deep carbon wheels but wanted something light weight. They are great but with one small problem. The rim strip on the front wheel had a little sharp point at the valve hole. This lead to several punctures at the base of the valve stem. Once I diagnosed the problem, I put some electrical tape over the area which seems to have solved the problem. In retrospect, I should have used a soldering iron to melt the offending sharp point.
Unfortunately I recently wrecked my WH-9000 C24s in a crash, but no doubt they were the best wheels I've ever owned - and I've had some good ones! Dependable, stable, fast and light... with an alloy rim surface for superior braking, I WILL own another set some day!
I recently purchased these and even though they came with 40mm Yksion Allroad tires installed I wanted to test out Mavic's UST tubeless. I removed one tire completely and reinstalled it. Seated within seconds using a simple floor pump. As soon as pressure got near 20 psi the tire popped into the beads. Easy as that. I deflated, added sealant, reinflated and it held air perfectly. Hubs are smooth, build quality seems strong, and although not the lightest wheels out there I dropped a full pound and a half off my gravel bike by replacing wheels, cassette and rotors.
Bought in to the road tubeless craze and after seeing a few videos, including one from GCN, decided to go with this wheelset. Haven't regretted it yet. Wheels and tires have been durable around Michigan's terrible roads, crashing through miles of broken asphalt and concrete, gliding along debris-covered shoulders, and shrugging off anything and everything in its path. The tires roll and grip very well at 80 psi, haven't assessed wet weather grip yet. Hubs engages very quickly and has a quiet but nice-sounding freewheel noise. Wheelset looks great with the aero spokes. Tires went on very easy, especially compared with my OE wheelset, where I removed some skin and blistered my hands trying to put tires on the OE rims. Very satisfied after 500 km of use so far.