I have many dozens of hours of flight time on 6 sets of carbon fiber props, and like them for their weight savings. As with plastic, they perform great once balanced. I don't have self-tightening motor mounts so I haven't had a chance to try the genuine DJI plastic 9443s yet, but I don't have a problem recommending CF. There are a few people on here who have strong opinions against carbon props, so note that YMMV. I have nothing against the plastic versions, they seem to work quite nicely as well.