Negative Positive
Title: NOT one-size-fits-all.
Review: This is a terrific idea, but not for everyone. If you wear a hat size that is L or XL, when you don your new Clic Readers the magnets will be 1/2 inch to 1 inch apart. The adjustability is in the length, not the width, so the notion that one size can fit everyone depends on how comfortable you want the fit to be, and how ridiculous you want to look in your readers. Why wouldn't the manufacturer offer these in S, M, L, and XL?
Is the review positive or negative? 