It is much faster than cutting without it, especially with doing multiple 2 1/2" squares. Like any ruler, you do have to hold it just so - in this case firmly so the strips don't distort. The ruler is not made of a firm plastic like my other rulers. It must be okay because my finished squares are coming out perfect with minimal squaring up.
I do like it and I do use it. I have the 12 inch one.