Tried this now, some success, but could do with some more features:
- Don't treat broken downloads as 'complete'
- Ability to clear or restart downloads
- Prioritising downloads
- Bandwidth cap
- 'Download all' option
- 'Download new' option
- Cancel button on the options menu
- Pause/Continue on individual downloads
Generally it feels really quite unresponsive as there's little to click on. Sometimes I think it's crashed, but it hasn't.
Anyone else any ideas?

I believe some of these, if not all, have been mentioned on the Features Wishlist topic.
Try adding them there, too ^_^