I recently made two throw size quilts using the same pattern of half and quarter square triangles. I followed the pattern directions and cut the required squares and it went together beautifully and very quick.
The second used the same large print with an assortment of black on black fabrics. I didn't cut the second one according to the directions. It took me twice as long to assemble the second as the first because I kept having to recount and add squares.
In the future when I make this, I will follow the directions