My Bernina has a quilting foot that gives me a perfect scant 1/4 inch seam. When ironed, the thread and folded over fabric makes my blocks come out almost perfect every time. This is especially important if I am doing several different blocks that I intend to sash and put together. If you are doing all the same blocks than accuracy is not as important as consistency. If the whole quilt is sewn with the same seam allowance throughout, it should go together well.