For me it is not just slow, it is not working. And this is just trying to download one episode. No queue.
The program looks like it is downloading fine, then when it gets to 99%, instead of processing, it starts the download again. Then around 60% the progress bar changes from “Downloading Video” to “Downloading Audio”. It then basically stops, but it does not error out. I let it finish once and after a few hours I got the success notification. When I tried to play the file it looked OK, except the audio cut out about 10 minutes in.
Of course I have opened a ticket and am waiting patiently.