Pretty darned good
I have used arch pads that stick to your shoe, but I liked the idea of having pads that stick to your foot.  Its easy to switch from sandal  to sports shoe and you don't have to buy a pad for every shoe.  You can even walk barefoot with support. They are easy to maintain by washing them and leaving them to dry overnight.  If you forget, it only takes a few seconds to dry them in the morning with a cool hairdryer. The only draw back is their reaction to sweat.  Even though they fell off after a tennis game, they managed to stay in place under the sock while playing.  They provide good support for those with falling arches.
Rating: 4 stars