I'm thinking about buying either the Spongy Wonder seat or the SpiderFlex seat. Has anyone used these and what did you like or dislike about these seats. My doctor told me to stop riding bicycles because of some nerve damage that I got from a century ride on my birthday. Another doctor suggested that I could ride a recumbant bicycle. Since the seat is much less expensive, I thought I would try that first. Hopefully, someone out there can provide a recommendation to help me decide.