You can use following gist to get the direct links to download packages:
https://gist.github.com/shahnhogan/ac2f4e941a07bc75536a495b1...
My use cases are very basic, but it just quite works all the time. My total backup is roughly 1TB with more than million files at multiple locations like local, remote SFTP and Amazon S3.
I like being able to extract the selected data(directory/file) from snapshot without restoring the whole snapshot.
de-duplcaition is icing on top.
The developer Jarek is very responsive on Kopia Slack as well.