Rated 4 out of 5 stars
Coming from Opera, this is the perfect replacement for its integrated download manager. While some stuff (like the bit-torrent download) is missing, you make up for it with other features like the amazing filter possibilities.
The reason why it only gets 4 stars is the window, that always opens with its use. I would have loved to pin it as an app-tab, but after I read that in your bug-tracker, that it would never happen, I can't give a full rating for the extension.