Kent Lee wrote a review of Superfeet Trim-To-Fit Green Insole on January 26, 2012
The squeaking that was mentioned is due to moisture build-up in the shoe and is not the insole itself. A little baby powder between the bottom of the shoe and the insole will take care of the squeaking if it should happen to you.
I have had these for many years and they are very good insoles although the custom made Superfeet insoles you use to be able to get were even better. They vacuum molded them to your foot.