I have two suspension seat posts and love both of them.

Unfortunately, I have a tender backside and as such, have a thudbuster on my fully suspended mountain bike. I also have a Cannondale R100 (very stiff bike) with a internal spring suspension seat post that is very old and I think it is a aveneur brand.

Yes there is a little bit of slop in them, and yes they are a bit bouncy. It just doesn't bother me.

I do like the extra comfort and if I got a new bike, I would carefully transfer either one over to the new bike or get another one depending on the situation.

On the Cannondale, I do have some neck/shoulder/tailbone issues and am sore after long rides or repeated daily commutes on the cannondale. While the suspension seat posts go a long way to soften the bumps, my third bike is a Vison recumbent which is ultra comfortable although slower and heavier.

Bottom line is that I really like the suspension seat posts, both of mine have been used quite a bit for a long time, don't know the mileage but our roads here stink so they get quite a workout.

Regards,
Cranky