I used to run a much older version of this on Firefox 50-something. I preferred the interface since it would open up a separate window I could move to one side and keep an eye on downloads as they progressed. Now I have to keep on switching tabs. Maybe that's just a web extension thing, but I miss it.
My main complaint, like others, is there is no way to designate where to send downloads other than a sub folder in my Downloads folder. I use other extensions that download files provide a save to window so I am not clear why this one does not anymore. I still use the extension regularly, but not as readily as I used to unless I really have a lot of files to download at once.
There also used to be a feature where if I had a save file widow in Mac Finder that it had a selection to use DownThemAll to handle the downloading. That again meant I could monitor the download in a side window if it was something slow to download.

Used to be better. Read the 1* reviews for details (even though I disagree with their 1* rating). Unfortunately, some of the step-backs are due to changes in browser developers permissions policies.

Absolutely essential extension. Batch downloading is a huge time saver. I miss the option to remove duplicate links, which was available on the extinct XUL version. The option to view/edit the entries is also missing, so a broken link cannot be reviewed nor fixed.

Works very well with images in light box.

So useful and convenient

Cannot download selection of multiple links anymore:
https://i.imgur.com/S7aLfkC.png

The resulting UI contains a white page:
https://i.imgur.com/2vLRgiL.png

Doesn't start let alone download anything. Without something starting or an icon appearing with my other browser addons it's unusable.

Destination folder option is missing. Without it it is impossible to organize. I remember I had it before, but now I see that they removed it.
That's why she left them 1 star.