I was looking for something for "Magento/Joomla" user database integation for my site. Then there's Jfusion, the answer to everything I needed. At first when I typed in "Magento" into the seach field here on JED, I was a little disappointed with the results until I came accross this.
In Magento, there is a subscribe function for newsletters which is a pretty big factor for my business, I can now link all the customer accounts with the Joomla User tables without any hassel.
Installation was a breeze, and when I got stuck, there is a mountain of good, well written documentation to get me started and get through anything I had problems with. So I didn't need any support from them.
All in all this is a must have for my purposes, and better yet, it's free!
These guys dont mess around, hats off to this team.
Thank you so much..