V6 is not 100% functional. These are some of the issues that I've failed to rectify:

1.  When logging in with an empty cart, the user is redirected to a blank page.
    So, you'll have to refresh the page to be taken to the estore page.
2.  If you click on the shopping cart link using the menu or sitemap, while products are in the cart, the shopping cart page
    displays four "trying to access array offset on value of type null" warnings. However, the cart still displays below them.
3.  The checkout page doesn't validate because the validator thinks customerID is not set eventhough it is.