everything has its value but learning from media is fun and feels less prescriptive!
yeah--for me it's the doubled "fun of language learning" + "fun of a show/song/book etc. I like," which doesn't really come with textbooks. (Also I'm prejudiced by having spent too much time compelled to use the terrible Japanese English-language texts...)

I wonder if you've seen this interview about their writing process?
I had not seen that, thank you! I wish they'd write more (unless they have a new pseud now?)

and you will definitely have to sample FUK Coffee and tell me how it is the next time you're in Japan ;)