I did the same thing, running one book I edited and another book I wrote through it, and it did quite well. I was particularly impressed with how the “hosts” came up with their own succinct examples and metaphors to explain what I had written at much greater length. (I should mention that one of those books was in Japanese, and they captured it clearly in English.)

Lately, when I just want to get the gist of a long article or research paper, I run it through NotebookLM and listen to the podcast while I’m exercising.

My only complaint is that the chatty podcasty gab gets tiring after a while. I wish it were possible to dial that down.