I have not had any problems using the Eleanor Burns strip piecing technique. I have very little squaring up to do at the end when I use my own 2 1/2 inch strips. However, when I use the jelly rolls, I sometimes have to square up quite a bit at the end and sometimes my blocks end up being a little smaller because one or two strips were not exactly 2 1/2. But I have made some real nice log cabin quilts from her book. I like them. I have not done paper piecing for a log cabin.