Cadense shoes for balance issues: good or bad experiences?

I was diagnosed with Parkinson's a few years ago and have taken two unusual falls. I say "unusual" because in both cases I suddenly found myself face down on the pavement with no idea how it happened. I have had one or two falls where I was out of balance and could tell that I was falling with enough of a warning that I could make adjustments to the fall to minimize the impact. But these two falls were sudden, unexpected, and a complete surprise ending to a normal walk. I am now convinced that's the Cadense shoe people have correctly traced this type of fall to a difficulty in lifting the foot forward at the beginning of a new step and creating a shoe that is friction-free in the front of the sole. I walk about a mile a day and have been using their shoe for about 6 months with no falls and am increasingly developing confidence in their design. I realize that not all PD patients have this type of fall, but I believe those that do will find relief in the Cadense product.