Swap out was super easy on the current gen HED Ardennes Plus Disc, installation took maybe 5 minutes. Interesting design in that the Campy version does not have ALL of the splines that a ShimanoSRAM has - maybe 4 or 5 only. So far has done great, 5 pawls is nice for quick engagement.
Having a HED Wheelset and switching from Shimanno 10 speed to Champagno 11-speed I had upgrade my freebody hub, buy this HE'D compatible Freebody Hub made to transition earlier.
I ordered this thinking that the 2015 and beyond part would fit my 2016 wheels, but that is not the case. 2016 HED wheels take a 5 paw freehub body and the they sent is only three paw. So be careful before you order this.