Easy to use and install. At first time it's not easy to find where to start, once you learn it's very smooth to add data.
Ease of use
Since its upgrade to J3.x it's easier to load data and new features were added. Would be great to include boostrap views on next updates.
Julien replies every enquiry even Traks is not a paid version.
It's very intuitive to use but I think there's no instruction manual or something