Granny, IDD looks like a form of decompression therapy. The equipment looks very similar to what I had some time back. I withstood several treatments with the amount of traction increased each time. The pain it caused me got to be excruciating so I had to give up on it. However, I talked to others while there that swore by it and some claimed it gave them back their freedom. The only way you will ever know if it will work for you is to try it. I tried everything under the sun to not have surgery and you should to. I wish you the best in whatever you decide.
Have a Blessed Day