Originally Posted by sweeks

I have a Helios XL and a Mu XL; both came with the ThudBuster and were more comfortable because of the suspension. The Mu is my designated "winter" bike. In Chicago there's a lot of salt on the roads, which may be responsible for the eventual fracture of the suspension part from the seatpost. The suspension felt extra cushy for a while before it broke. I'm still using the other one and not particularly worried about it. Watchful though!
Steve