I bought this for my parents who have both got back problems, one prolapsed discs and arthritis the other Arthritis in hip and pain in lower back, it has gave them a new lease of life, my mother is on very strong painkillers but was still in a lot of pain so much so she couldn't hoover 1 room without having to stop, after using it the night before she hoovered the full house (it's a large house, 5 bedrooms) without having to stop and only felt a slight niggle at the last room and the pain had gone by the time she boiled the kettle, my father who refuses to take any tablets is even happily using it and now can jump in and out of his jcb without flinching all day. It's not greasy, it's working a dream for them, definitely worth a try, I only bought it thinking if it even helps a little it's worth it if not it's not a fortune.