I find the instructions excellent!!!
I just finished making the jump-start duffel bag and I discovered one error: cutting out the 2 rectangles 9" x 18" for the bottom stiffener does not allow for seams, my suggestion is to add and extra 1" at the sides - so 10" and 19" at the ends to allow for seams.
I am totally in love with the bags, my friends and family are all asking for finished products from me.
Keep on sewing.