Obsydian
Did you get the self-published editon or the Lewellyn published one? If I recall correctly, I think the first edition had much better cardstock than the mass produced copies.
It's the mass produced version, but it's still not as flimsy as say, my Pagan Cats. It's held up to quite a bit. Actually now that I hold them together, it's the same thickness and cardstock as the Animal Totem Tarot, if you have that or have felt that.