In like 1 word killer!; 2 words: must have! Rated 5 out of 5 stars
For the person who downloads day & night to just your average web browser: this is an absolute must have extension.
Not only does it cut downloading time substantially but it makes managing downloads much easier. From custom file names, to full web site mirroring. I can think of only a few days when I've not needed this extension.
For productive uses & also just for fun[as of FF3] this is my abs. fave extension. A must have for every web browser to web & software developer. Honestly I'd like to even see this wrapped in XULRunner & available as a stand alone download. It seriously is just this good!
All I have left to say is: *w00t!*