A lot of product filters/options
- Filter products by category/tags
- Repeat last search after adding product (for example, you add products with similar names)
- Add items to top of the cart (no need to scroll if you add 10-20 products)
- Hide products with no price defined
- Enable/disable sale for "out of stock" products (allow backorders)
- Set visibility, sku, tax class for products added on fly