I’m super interested if this works. My daughter can no longer go on hikes with me because going downhill causes pain in her knee for days. She’s seeing a physio for this, but physio costs $100 (CAD) a session and this costs $80 (USD). In order to hike and avoid the pain, I think it’s worth it.
ETA: I don’t have high hopes of this being more than a gimmick, but still I’m interested.