I recently prepared my 1st ecommerce website demo in megento.
This PHP framework looks very easy to install.
Megento and Zend are working together [link]. Zend is another PHP framework.
One of the nice features is sample data provide bye megento community.
Initial frontend [build in theme] and backend [admin panel] looks very nice with lot of options.
In my localhost, this demo site was loading little slowly. For running megento in server, maybe we need a powerful server (one of my friends also told that).