From the first time I use Joomla! I have always disapointed about how to add a file to an article. Uploading using the media manager is not helping (you don't know how to add a link to that file to an article). But this component has the answer.
Everyone who deals with uploaded files should use it.
Oh, another one: I think the attachment manager should be sortable and searchable. :)
Thanks. It's great!