I push hard for accuracy to the point where I make practice blocks to double check my cutting, piecing and pressing before turning to my good fabric. It's partly an OCD thing with me, plus my mom stressed it when she was teaching me to sew. I'm so grateful to her that she instilled in me a desire to be patient and take my time so I would be proud of the finished product. Also, I've found that accuracy in piecing makes machine quilting easier, particularly when stitching in the ditch.