Takes a few dozen steps to feel comfortable.  Then you are good to go.
Have good sissors ready since they must be trimmed unless you wear size 10.5 bowling shoes.  This is more critical with these insoles since they are orthodic - not just a cushion.  Walked around the house in my bowling shoes for about 10 minutes before the insoles started to comform to, and support, my feet but once that is done they are very comfortable and perform as advertized.
Rating: 4 stars