The squares are all great to use whenever I need to make a journaling block, atc, mat, etc.... And if ever struck by writers block, just whip out the stencil. Everything is set out for you, so you have balence or "harmony", but you decided what to fill the spots with so you are still using your creativity.
I can get my LOs done quicker with EK Success. Just pick a square & insert an item, whether it's a picture, embellishment, title or journaling; the hard work has been done for you. If your picture is a different size, just rotate your Plan-A-Page or take up two squares. So simple. If you are having scrapper's block, like I have sometimes, it is a great tool to have around to get you going.
No matter which Plan-A-Page template you decide to try, I think you will find that you can't be without them. I have 6.