I actually read all of these stories in book form, not knowing they were also in video form. This was in a pre-internet era when information wasn’t just sitting there waiting to be read.
When I watched the first of these (Still many, many years ago) I went through those weird stages of deja-vu. First I thought it was copied from somewhere, then I started thinking I saw it before, and then I suddenly remembered that it was from the books.
All in all I remember the stories being pretty good, but I was younger so maybe I’m misremembering. However, this won’t stop me from chewing through these like there’s no tomorrow.