Use Cases and Deployment Scope
We use BigCommerce to manage several brand websites. One serves as a "catalog" with no items for sale, but customers can view product information, download catalogs, product specification sheets, and find referral links for purchase. We were able to customize the theme to support all these functions including programatically created embedded HTML panes for purchase links.
We also websites on BigCommerce from which we do sell items, and were able to considerably customize the purchase/add to cart interface to suit our products, allowing customers to simultaneously view and add multiple product variations to the cart via a table format.
Overall we have been using the platform for over 5 years and it has been a stable, fairly flexible solution without any major problems and we have been happy with it.