I have this one. Last time I used it was prob 5 years ago.
Back problems went away when I retired from work. I think too many hours of sitting were the fault.
The table is relaxing..I always felt better afterwards. I don't know if it did anything beyond that.
It folds up and stores against a wall, if wanted. $105@Amazon
When upside-down, the angle is adjustable so that you don't have to be completely inverted.
