Sandbox

I am looking for a robust shopping cart that integrates with Joomla.  Commercial cart is ok.
I have tried VirtueMart - which has all the features - but contains too many bugs out of the box.
Would value any recommendations.
PMark

Another option for an ecommerce addon for Joomla is ez Store http://extensions.joomla.org/component/option,com_mtree/task,viewlink/link_id,199/Itemid,35/. It is rated positively by the users.