I rescued and upgraded a Japanese built Raleigh Mixte for my wife (she prefers the 27 x 1 1/8" tires to her old MTB with 26 x 1.75"). One of the upgrades was a suspension seatpost. The tension is set pretty high, so it isn't too spongy during normal riding. She is very, very happy with this set up. Nashbar was the only supplier that stocked the odd size of 26.0 mm, though. It is very similar in its "bump dampening abilities as the Brooks Champion Flyer on my bike.