In the German Podcast “Wanhoffs wunderbare Welt des Wissens” in the newest Episode, Part “Folge 208, Teil 6: Dank an LingQ, Abmoderation” is LingQ mentioned. I think the producer of this podcast give a very good comment for LingQ. You find it in the German Library.
Additional information: I stopped now transcribing this podcast because there is only a small number of an intermediate and advanced learner of German. Maybe I will transcribe more episodes in the future when there is an interest in more episodes.