I recently bought a hula hoop, but can not for the life of me keep the stupid thing up! LOL! I don't know how I used to do it when I was a kid! I haven't tried that particular one Tati, but if you are better at it than me which I am sure 99.9% of the population would be, it would be a great workout I bet.
They had a bit on hoola hooping for exercise in the last InStyle. It said that you have to do it for an hour! That's a lot of hoola hooping, if you ask me.