I really love this seat post. It rides really well. I got the 31.6mm version along with the heavier spring that supports 220 to 264 lbs. There's an adjustment on the seat post bottom to fine adjust the spring. It appears to be made really well. The pins and frame are all solid with brass bushings. Plus, it's kinda cool that it matches the Sun Tour NCX front suspension forks that I have on my Dash. Nice alternative to the Thudbuster.