I use the inversion table for about two years. I was to the point where I was 90° upside down, rotating side to side, etc. It made my back feel awesome. Then one day unexpectedly, I got vertigo. After months of treatment, for that, and through a process of illumination, to figure out the cause of vertigo, and or how to eliminate it, I decided not to use the machine anymore. It did really help my back! But I’m afraid of getting vertigo again.