It's not user-friendly at all. It's awkward to use. Buttons are automatically hidden with ugly big icon that we have no idea what they are unless clicked.

What's even worst is that we have to select a book EVERY TIME WE WANT TO READ from our files.

Uninstalled. It's not even useful anymore. There are plenty of other add-ons out there that actually have common sense. This is a really bad design.