I, too, used the 2" grid for a millenium quilt and got along well with it. No way I would have ever had any luck without this fusible backing as I used 2000 different 2" squares of fabric . I folded the backing with the ironed on fabrics along the vertical lines, stitched all these. Then did the horizontal rows with a clip at each intersection allowing the seam allowances to lay flat, alternating left or right. I quilted it using a diagonal line from corner to corner in one direction.This worked out well for me.