I've been riding a suspension post on one of my bikes for nearly 4 years. So far, its all cons and no pros and its the next thing thats getting replaced on that bike. The more I ride the more sensitive I get about seatpost height, and the suspension post just annoys me more and more. I've never noticed it making the ride significantly softer..it doesn't absorb vibrations any better than a mildly padded seat, and when you go over things like pot holes you tend to take your weight off the seat anyway...so really whats the point? The worst part about my particular suspension post is that when you spin at a really high cadence, it exagerates the bouncing, sort of like a trampoline, and if you spin really fast, your fanny will bounce right off the seat.