The free version has all the functionality I needed to make our 7000 volume church library available on our website.
Ease of use
Quite easy to use on both the front end and back end. I trained our volunteer librarians in about 30 minutes.
The support is excellent, even for the free version. I've contacted the developer a couple of times and got responses in a few hours.
The documentation has improved considerably with version 4. The documentation on expiring and importing and upgrading versions has improved.