I purchased the Teeter Hang Up 4 years ago. I suffer from occasional upper back pain and use the Teeter when I feel it coming on. Just recently I experienced lower back pain for the first time ever. I looked into stretches for lower back, used the Teeter at a 60-degree angle for 2 days, no relief. I ADJUSTED my Teeter Hang Up to an 80-degree angle, and while upside down did some slow twists. When I uprights myself and bent down to release my ankles, there was NO PAIN! I am ever so glad that I invested in the Teeter Hang Up and highly RECOMMEND this product!
Bottom Line: Yes, I would recommend this to a friend