Well done. This is something close to miracle tech, at least for the people wearing it.
I can't help but feel curious whether they're a viable alternative to wheelchairs, or if it's a temporary feeling (kind of like riding on a rollercoaster, in that you go and do it for the experience and then return to your normal life). But that's just my ignorance talking.
Also, fuck the US insurance system. You won't find many topics that make me talk that way, but as I get older it feels something closer to pure evil. I've met so many people who have been screwed over by that system (and personally experienced my share of it).
There's a woman I've been texting with who I met at a gas station. She was clearly in distress, so my wife and I offered her a ride home. To cut a long story short, she spent her fourth of july miserable, and when I raised the idea of getting prozac or some sort of antidepressant (my own "miracle tech"), she said "Oh, I used to be on that. I can't afford it because no insurance" and I practically flipped my phone onto the concrete. She could be living a normal and happy life.
I can't imagine how much worse it is for parents who otherwise need to spend $thousands for alternative solutions like this. If you can make it in any way affordable, it'll change countless lives, I'm certain.