I am building the new version of a pretty big website, and I imported quite a bunch of content. For me, being able to categorize medias is a key feature. Being able to do so in such an easy way is great! ^_^
(I messed for a while with Pods CTs then I found this plugin just a moment before throwing the PC out of the window lol.)
I can't understand why it isn't a core feature. Such an improvement of Media in 3.5 could -should- include that too.
The 5th star's to encourage you, otherwise this would be a 4-stars review.
Because it would be really perfect just if the features of the "Assistant" tab (created in Media menu) would be implemented in the core "all media" page.
You know, it's not a big problem for a decently savvy user, but in my company I'm the only one, and I bet that in many other small companies the situation is the same. ;)