It's not complicated at all. All seams are sewn full length and then, where the seams form an X, you pick out any stitches that went out into the seam allowance. (Gyleen Fitzgerald says the reason you sew all the way and then pick out rather than stopping is that last stitch you save is tighter if you sew past and then unpick.) Sooo much easier than marking all the 1/4 seam marks, trying to line up the marks, stopping at just the right place. This way you are not lining up marks, but lining up the fabric pieces, edge to edge on top of each other and sewing like traditional seams. You basically ignore the other adjoining pieces (folding them back in half on themselves like the wings of a butterfly) and just unsew where you sewed past the intersections. Open it up and everything is lined up perfectly and super flat. Seams kind of automatically go where they need to go, swirl in the right directions. Then press. I love this method! So thankful there is not just one way of doing these things and delighted to finally find one that works for me. There is a video of Gyleen teaching this on a web site where you have to sign up and pay for, so can't post it here. The photography is much more professional on hers, so you can see better what she is doing.