Here's my finished center block for Myrna Giesbrecht's Press for Success class at Quilt University. It went together so easily. I love putting blocks together this way! And check out the back:
What I really love about this (besides the flatness of the block) is that the blocks will join easily with butted seams. Take a look at the photo of the back. To join blocks, turn one a quarter turn and see how the seams butt up to each other so well! Hoorah!