Here's a little photo of my Airhawk seat cushion after 15,000 miles. This thing has doubled my riding time. Given my *ahem* age related physical issues, anything more than a couple of hours on the bike left me feeling rather beaten. This cushion has allowed me to ride all day. I can honestly say this is the best accessory I've purchased for my motorcycle, hands down.
The inner cushion is still good. I only had to replace the cover.
Y'all know I don't do product placement unless I really like it. I'm not getting any money or even any notoriety from Airhawk. They just work that damn well. If you're a rider, look at their seat cushions. They also made cushions for passenger seats. They're worth every penny.