I like carbon fiber and I have been known to buy packs of playing cards, but every time I see these I skip them.
For one, they're all effectively marked cards based on minor difference in the CF weave along the top and bottom edge of the cards. The weave isn't perfectly square to the shape of the card, so minor differences are easy to spot and recognize among cards. this will be true from the back as well when people are looking at you holding your cards. The only way to fix it would be to work with perfectly calibrated sheets of carbon fiber. Like, they don't even do that when they make LSCF. Look carefully at good CF and you'll still see irregularities in the weave. It amounts to unintentional card marking.
For another, they look like they're really hard on the eyes. Just as a personal rule of thumb, if you have to squint to tell face cards apart, there's a problem with your design no matter how cool it sounds on paper.
I like that they're trying to innovate, and I like that they're making stuff out of excellent material, but they aren't ready for market and might never be.