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.
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.