Nice dense code with simple output.
DownThemAll does not see links as having MP3 format, so files have to be saved individually.
Displays links behind main page content, so they're half-hidden at narrow resolutions (e.g. tallscreen).
Ideally links would be displayed in-band with the page content - maybe on-hover like the "buy track" links? - and would make automatic album saving trivial.
Overall, it serves its purpose well.