problems with woocommerce

hello, we are testing wp fastest cache and it is a marvel, the web loads very fast.
However it does not give the feeling that the products in the woocommerce store are not cached.
We have preloading enabled in the general settings of the plugin and we also have autocache enabled on the individual product.
What are we doing wrong?
Thanks for your help.

The page I need help with: [log in to see the link]