Hi,
yes, after you click on one product, in this case the box: http://diepferdebox.de/box/
at the bottom it says ‘jetzt entdecken’ that’s the buy now button. Its just adding the product to the cart but not going straight to the cart.
if you compare it to my other theme for example:
http://www.placevel.de/city/
it goes straight to the cart if you click on ‘jetzt entdecken’ at the bottom.
bst
Stavros