People seem to have a love hate relationship with using a Swiss ball as a chair with everyone seeming to have a different opinion. They are comfortable and cushy but there is no research that I am aware of which has demonstrated any real benefit to using one.By the same token I know of no research which says they are bad. Using one to perform some exercises seems to make the exercise more difficult resulting in more muscles being engaged but for other exercises they tend to degrade the exercise.
I am not sure there is a definitive answer, this is one of those try it see if you like exercises.
It is called WORK-ing out for a reason.
I said getting fit was simple, I did not say it was easy.
Cardio burns calories, strength work burns fat.
Eat well to lose weight, exercise to get fit
You can not build a six pack using twelve packs
Often when we seek a magic bullet for fitness we end up shooting ourselves in the foot.
"I think calories are little germs in food that all moms are afraid of" Dennis the Menace