@spotiche5- I use an exercise ball for different types of pain including lower back pain. For me, this exercise has worked wonders. It is low-impact, effective, and easy to do.
As far as being safe, I have not had any problems doing exercise ball workouts for my back problems. However, I was cleared by my doctor to go ahead and begin this exercise regimen, and I recommend that you do the same. Also, don't buy the cheapest exercise ball you can find. If you invest in a high-quality ball, you will find that it will last a long time and provide you with the best workout possible for your back pain and other issues you may have.