Ask your back doctor before you decide.
I bought one after thinking this would relieve my back pain, but because my L6 disk was herniated, it pinched a nerve and I was unable to lay down without 2 people supporting me after hanging at about 60 deg. I had to stay down for over 6 hrs before I could get up again. I ended up giving the machine away.
I hope you do not have this result, just check first to be safe.
