My feet are so flat you'd think you saw the tracks of a duck with toes. I don't wear shoes with arches I can't remove (I mean I literally buy the flattest shoes possible, take out the foam/and saw out the interior of the shoe in order that my feet won't be in pain). Every pair of clipless shoes is arched. I can wear a raised heel but nothing with arch support. And it sucks.
So I'm sure the shoes work. I mean, just the idea of a better transfer of energy from your muscles to the pedals has got to be something huge. And frankly I'm bummed that I've never tried a shoe that I could see working.
I don't have them but I'll be hecked if I wouldn't if I could.
or something like that...
Harv