Only had inversion table for a couple of weeks and so far it appears to be winner for my bulging discs. You don't have to invert all the back for the benefit. Very sturdy and something I should have purchased years ago. The IronMan 4000 should be part of every ones fitness arsenal. My only complaint is with IronMan- Paradigm Health and Wellness Inc. Tried to reach customer service with an assembly question. Called several times and left message each time. So far NO call back. Very unprofessional in my book. Fortunately, the Inversion Table makes up for the unprofessional behavior of Paradigm Health and Wellness Inc. If I had to rate Paradigm Health and Wellness Inc. they get ZERO stars. The inversion table gets FIVE stars. If any issues surface, I will update this review.