I never heard of Superfeet -- is that a brand?
Jenn -- I too have a VERY HIGH arch and have had trouble running all my life because of my high arch. In fact, when I got my inserts, the PT Sports guy said "I bet you could never run with those feet". The inserts he molded for me are for all athletics, even daily walking, not specific to cycling. Although he did specify thickness and a few other "tweaks" for my cycling shoes. With a high arch, your feet do all kinds of weird things (maybe everybody's does), especially as you age and things wear down or out or whatever.
As for cost, one pair is $300 but lasts about 3 years. So, I figure it is like buying one expensive $100 pair of shoes each year -- one COMFY pair of shoes each year!

