Based on Joomla MVC framework with all its advantages

 Template overriding,
 Implementation of Joomla Plugins for: payment, shipment, coupons, calculation rules, custom product fields, ...
 Simple installation and integration of other joomla extensions.
 Joomla 2.5/3.x ACL

 Categories
 categories
 with meta tags for seo
 with description and media

 Products
 with meta tags for seo
 short and long description
 dimensions (weight, size)
 multiple media
 multi-variants/attributes for products (variant-matrix)
 unlimited child products and derivated levels
 product pattern (Parent product used as pattern for child products)
 related products
 reviews and ratings

 Shopper Group
 pricing depending by shoppergroups
 price display depending by shoppergroups
 payment/shipment depending by shoppergroups

 Shoppers
 customizable shopper input form
 input form depended on registration, checkout or shipment
 recaptcha
 adressbook
 default Bill-to and Ship-to address
 default payment and shipment method

 Inventories
 stocking/inventory
 stock warning
 virtual stock (ordered but not finally bought)

 Prices
 various type of prices to display depended by shoppergroup
 prices adjusted by shopper choosen currency
 different currency format per currency
 unit price
 quantity based pricing

 Real Multi Currency
 auto updating rates
 add your own currencies for fixed currency rates

 SEF/SEO
 default SEF/SEO integrated

 Dynamic Caculators
 discounts based on time, category, shoppergroup, country, and state
 tax based on time, category, shoppergroup, country, and state
 discounts, tax per product and/or order
 discounts, tax have their own currencies (for duties)

 Payment
 based on plugins, already onboard:PayPal, Paypal Pro, Paypal Express Checkout, Klarna and Klarna Checkout, Sofort Banking and Sofort iDeal, Skrill, Heidelpay, Authorize.net, Realex(and a lot more in the net)
 minimal amount / maximal amount to use a payment
 transaction fees
 by countries
 by shopper groups

 Shipment
 based on plugins
 by shopper groups
 by countries

 Checkout
 guest checkout; completly anonymous checkout
 option to register at begin of checkout
 cart is an object, competly overridable by template
 cart is stored in the session
 multi-page checkout
 one page checkout
 SSL

 Orders
 payment/shipment workflow
 history
 modifiable
 order tracking for anonymous users
 order editing
 pdf invoice, delivery note

 Product Display
 latest
 topten (most sold)
 newest
 featured
 sortable
 searchable
 shipment/payment

 Multilingal
 native with Joomla!
 allows partial translations

 Promotion and tools
 coupon handling