Don't like Carbon Fibre. It has a habit of being damaged without giving any outward signs that it is damaged. When C.F. is damaged- it breaks without any form of warning whatsoever. It can be damaged in so many ways. Problem in production, Overtightening of the seat clamp, Sudden impact that damages it internally without any sign that you can see, and the worst one out of the lot-It can break for no apparant reason.

It may be light and it may take some of the sting out of a harsh ride but not for me.