I had some problems getting it working, but the developer responded immediately and fixed the problem within a couple of hours.
The coding is immaculate and the support is also superb. There were virtually no bugs and a couple of minor problems I reported were fixed within days (often hours) of reporting them.
Still, a Magebridge project requires a lot of work and is not for the faint hearted. I would think carefully if you actually need the features of both Joomla and Magento in your store. But if you do, then I would definitely recommend Magebridge.