I've done extended testing on all three settings on my 350F. I'm a bigger (read fatter) guy and weigh in at around 250. I started with the softest setting because it was my first bike and I figured leave it where its set. I found that it was like sitting on a trampoline. Bouncy Bouncy Bouncy all over the place. I have the original tool kit, I think its called a spanner wrench? It looks a little like a question mark with a hooky thing on the end, makes it way easy to adjust. So I immediately bumped it up to the middle setting and it was a lot better, but still a little springy, but nice and soft on my bum. Then onto the firmest, which feels the best when I'm going through twisties, but after 30-45 mins on the sweet wobbly broken pavemented pa highways my rear starts to get a little sore. So for commuting or cruisisng around I leave it on the firmest, if I decide to go on a longer ride, I put it on the middle.