The quantity does not work for me too.... but i think i am taking that off completely for now... i might just show the how many left in there...
I guess another function from the shop might need to be imported or added.... try to add the same thing as in the cart.php i would imagine...
I have not managed to get the sku and/or any tags .... it would be great if we could somehow just target specific things to show ...
Sorry for the late response...