It's confusing to filter stuff on a page to only what you're trying to download. You also have to install a standalone app on your computer. It also randomly downloads whatever the heck it wants from a page you're looking at. I don't know how to make it download _only_ the stuff I tell it to. It's a very powerful tool but the UI is pretty bad--that plus randomly downloading anything it wants without being prompted is pretty rough.
Integrates the browser with JDownloader, allowing direct sending of downloading jobs from the right-click context menu and interrupting the built-in download manager
Requires a native client for native integration with JDownloader
Can work without the native client if JDownloader is running in the background
Offers functionality to download all links with JDownloader