I'm wholly satisfied with the designs and the grade of detail in this set. The Celtic knots follow the rules as I know them.
I'd give 5 stars if at least one design had layers to customize or age, as appropriate, the pages, and perhaps the covers, too. LZW use PDF layers for such customization in some other products, though to be fair, layers were neither mentioned nor implied in this product's description.
[4 of 5 Stars!]