Yes I bought one pair of vionics earlier this year, gasping at the horrendous price but suffering chronic arch pain.
I now have 4 pairs - well, 3 and one on order. I can wear them all day without pain or rubbing. Well worth the money. I don't think I'll ever buy anything else now.
I think buy one pair to see if they work for you, and then you will know. Sizing if you buy new is standard (I gather old sizing ran small but has been changed. I have bought my standard size.) One pair feel slightly tight when I put them on but they seem to stretch while you wear them, and have a comfort lining.