I am currently in the middle of a log cabin quilt (my first, it will be throw size). I am using the Creative Grids ruler, 6" block. This method appealed to me as I wanted that little bit of wiggle room. I like that when I trim the last 2 sides on the 3rd go 'round, all my blocks are 6" square. What I don't like is that there is more fabric waste with this method. However, it is a good method to use if you are making a scrappy log cabin and using left over pieces of fabric already in your stash.