Integrate with WordPress
It would be great if there was a WordPress plugin for 1ShoppingCart that works the way FoxyPress works with FoxyCart.
You can add products from within WordPress.
Having to enter and maintain two separate lists in two separate systems for the same information is awkward at best, and an invitation for the lists to get out of sync. It's not too terribly bad for a small list of products and one person doing all the data entry into both systems. Gets awkward as the list grows.
Annabel Kaye commented
True, the lack of integration with wordpress or mailchimp is going to be a deal killer at renewal time