i have some on order tinman, should have been here before christmas so i should have them soon fingers crossed, i'll keep you posted.
mark chisholm has a pair, you could talk to him. also rupe, dont know if he posts on this forum, he loves them, only problem he has had is on ash trees.
i tried some on at a recent show and the gaffs were way longer than what im used to, also the angle seemed funny.......because of the rigid top pad the shanks dont skew to the side as your normal spikes will, hence your gaff sticks out at a parallel angle to the shank running down your leg.
in my case it threw my balance out of whack and made it feel like the spike was positioned too far to the back of my heel. i'll get used to it though im sure.....just c ouldnt turn the whole carbon thing down