This is the original Back Revolution which helped me rehabilitate a serious herniated disc condition. It is very easy to step into and invert your posture for immediate gravitational relief and decompression of the disc space. This enables strengthening exercises with reduced pain. It is used, but still functions like it was new. Mine does not include the massage wand like the one in the picture I used for this post. The new ones are around $300 and have a pad on the base which mine never had. Not sure why you would need it.