Carbon blades do what they claim. They resist the average breaking point of a stock blade.
The advantage is obvious. Less prop breakage and replacements.
The problem is that sometimes you want the "Give" that the stock blades have so as to not burn out the motors or ESC's. Neither like to have a sudden stop. The ESC's keep feeding power to a motor that won't turn. Get it ?
Not good.
I've used my carbon props twice. I keep them for spares and nothing else.
Jmo thanks,
Jafo