[stomachmonkey]

I have one.

Use it daily.

Do some stretches and sit ups while in it.

Don't know if it helps anything but I feel better when I get off.

If I slack off and don't use it for a while I feel it.

I do a lot of sitting for work.

I think if that's your case you'll find some relief.

Cruise craigslist for them.

You can always find someones barely used at a deep enough discount that it's worth taking a flyer on.