Here's my take on these shoes. I've ordered so many pair of them and most I have had to send back due to knee and back pain.
I have a very bad back to start with so I'm not blaming Orthaheels for that. Get that straight now.
I think some people are flat footed like I am. That's what's wrong with the girl they keep showing. She pronates inward (like I do an many of my family members do). I have a daughter that pronates so badly we took her to Children's hospital when she was little. We had to have special shoes made for her.
However, only one of my feet pronates inward (for that foot, I need something that gives support like orthaheel.
When I wear both of those shoes my knees hurt worse, my back is worse, the entire body is hurting.
The best thing I do I that I have had inserts professionally made for my shoes. The problem is they don't work well with sandals.
For me Birkenstock shoes works. I own over 100 pairs of Birkenstock shoes. i realize they are expensive and most people can't afford them.
I am just saying that might be why some people love these Orthaheels and some people can't wear them.
If you have two flat feet or two feet that pronate inward (like the young model) then they work good for you.
My experiment is unscientific, just my experiences.