Haven’t tried these yet but they look very comfortable!
TBH, I was not sure if these were a good idea for me, but was curious. Tried them, and worn barefoot, I found my feet tended to slew one way or another. If your feet supinate or pronate, this may exacerbate the situation; it feels little like balancing on gel packs. The fabric was a bit 'grabby' in the shoes I tried them in and hard to position in the shoe; YMMV.