One of the amazing things is that MageBridge makes several Magento-issues (like layout stuff) more easy! Using another Yireo-solution (VM2Mage) VirtueMart-orders and customer-information (including their login-details) are migrated to Magento.
A good website requires a sitemap, so a plugin for the Xmap-sitemap component to display all Magento-products in the Joomla sitemap is available too.
Okay, to be honest: VirtueMart is easier to install and configure, but Magento has MANY more options, it's REALLY powerfull. This makes MageBridge is a very imposing Bridge. Yireo's documentation is more than complete. And: they gave me excellent support!!
If interested: see www.condoom-anoniem.nl for the results.