Fellow Deutsch duo student here, on a 5y streak (paid plan)
While I do see the occasional AI slop in there and it's annoying, I think the product is still good. My own complain with it is that the course is too short, you'll finish it before getting to more advanced concepts or sentence structures, and then what?
Myself, I've restarted the course two times (using different "from" languages each time) in order to keep practicing, but when I finish this third round, there is no other language that I speak and can use to practice German. What's next then? What are you looking at?
Myself, I like to complement Duolingo with a daily listen to "Langsam Nachrichten", news bites read slowly and with simple vocab, from the Deutschewelle: https://learngerman.dw.com/de/... (I have it on my podcast app, new episode ready every day)
I also always liked Coffee Break German, but haven't tried their premium course yet, only the free podcast (which is really good) https://coffeebreaklanguages.c...
Bis bald!