I have a set on my
P4P and they are wonderful...got them from Drone World. just make sure when you use them the first time they are fairly well balanced... see the suggestion above from "
GrammatonxXXxCleric above. You can then check this by taking off and touching the landing legs/antennas and feeling for how much vibration is present with your factory nylon props... then install the CF props and do the same checks(static & dynamic)... if you get excessive vibration land immediately and remove the CF's , and ask for your money back..... I would however recommend prop guards for this check, also when flying CF props in close quarters or just to keep from tearing them up incase of contact... they are kind of pricey... and sharp, and chip if you contact something very solid.... as for injury.. oh, Yeah... they cut good...!!!
But, as for the performance enhancement, WOW...!!! they CF props are stiffer and provide much better thrust,lift speed quicker wind response and acceleration, as well... and I've seen about a 1 to 3 min increase in Battery life, depending on how your flying... and the wind conditions, air density... I can't wait to see what would happen with a set of CF Q-Tip props...!