I have been using one for number of years. In my opinion these are the best. They use medical technology, same as used for patients in wheelchairs, which consists of air cells that are interconnected. The cushion only needs very little air so it raises seat height for less than an inch. It also adds more air flow at your bottom so less sweating. The material used is breathable and not sticky to the skin.

Here is a picture of mine:

Attachment 5488

I have since added Mustang seat, which I think is much nicer than stock. I continue to use the cushion as it increases my saddle time. My cushion is several years old but looks like new. It is a bit smaller than F6B seat as it was bought for a different bike but still works for me. They do make bigger ones.

I hope this helps.