I don't often hear of people with vision worse than mine (-9.0 with astigmatism). I've worn glasses since 2nd grade and still recall the wonderment of the first time they put the glasses upon my face and actually SEEING the world.
I looked into this for myself and my eye care professionals have advised to not buy into it. And, my vision insurance does not cover it.
I may be a special scenario because of the astigmatism or because I have an incomplete blink - my lids don't meet completely so I need to use drops more frequently when I wear contacts. I've been advised the method is not proven and will reverse if I ever stopped wearing them, even for a few days or a week. I'm also not a candidate for the surgery to permanently fix my vision, not sure how that correlates to this either.
I'd advise getting a second opinion from another eye care professional in case this eye care professional is financially invested in people signing up for this.