Best online shopping cart 2013

Google search and duckduckgo are FAIL when suggesting the best shopping carts.

Prestashop
The best
easy install
good navigation
easy to install and uninstall modules
negative - tough to edit the front page/front office layout

Open cart 
easy to install
good nativation
negative difficult to add addons


oscommerce easy to install ,limited features ,
negative difficult to impossible to install modules which all have different ways to install


FAIL
negative magentocommerce error 500 major cgi and other issues