Have had one, the bottom part of the topper isn't that great on mine which has proven difficult to get the saddle level and torqued to specs (+-4Nm) without it moving around.
Could maybe be solved with griptape on saddle rails, but a genuine used Cdale popped up locally so got that instead.
Anyone used/been impaled in the bum by one of these?
https://www.ebay.co.uk/itm/Hylix-Carbon-Seatpost-25-4MM-400MM-145g-for-CAAD-SuperSix-EVO-Synapse-CAAD12/351671725419?