Jenny apologised!

I have seen this discussion on these boards before, and I went and checked my rulers against my mat and they were dead on the same. But I use both ways, depending on how big a cut I am making. If I am cutting something longer or wider than my ruler, I line it up and count off on my mat and use my ruler as my straight edge for cutting. If I am making a smaller cut, I'll use a line on my mat to be sure I have a straight edge, square up what I am cutting, and use my ruler to measure then cut. I am of the opinion that you should use whatever method works best for you. As long as the cut is straight and accurate, does it really matter what method you use?

For me it depends. If I'm making an intricate quilt pattern that really demands perfect cutting for success, I use my ruler only and I stick with the same one throughout the process. But if I am making a pattern that is less demanding (like a double slice layer cake quilt) then using the lines on my mat works well. But whether I use my mat or my rulers, I always double check by counting! :D