...as the title says, I would like to know, in your opinion and with reason if it's not too much trouble, what the best fitness ball would be to get. I'm not looking to spend more than $30.00, btw.

Thanks for your input.

I bought a Bally Total Fitness one from Wal-Mart, but it lost air quickly, and I wasn't as firm as one I had used before in school. I don't remember the brand that was used at school. I would like something that will last, but mostly, one that stays firm.

Thanks again,

Macky