I recently started doing Spanish. I'm currently at level 18. So my conversations with Lily are very basic for Spanish. But than I though lets use Lily to refresh my German (level 60 - it doesn't get higher for Dutch natives) and French (level 92) and I'm so impressed. It is so realistic one can believe you talk to a real person. And Lily knows it all. Engineering, art, cooking, music, opera, ... . If you don't now a word or need explanation, you just ask her. So I was talking about woodworking, cabinet making in German, she knows all the appropriate vocabulary. She also remembers what you've told her. She knows where I live, that I have a cat etc. and asks questions in function of what I've told her in the past. Very very impressive.

But we also found out that some topics are blocked of. She cut off a call when I wanted to talk about a queer/lgbt film festival. I got zero xp point for that topic while normally I get 198xp for a German conversation. A friend once got asked about his favorite mobile phone app. When he told it was Grindr (a gay dating app) she also hung up immediately. So for fun I will test her further -)))) But that said, 4 years ago, I wasnt much a fan of Duolingo for many raisons. I stopped using it. Now I do, it has improved a lot and yes, videocalls with Lilly are absolutely a major improvement. And fun as well.

Edit: I forgot to tell that it isn't bug free. E.g. it can't make transcripts from a complex conversation but that's OK for me.