My feelings towards George R. R. Martin aka "GRRM" are mixed.

Reading the existing books was highly entertaining, even when there were things in the books that displeased me.

Watching broadcast of that first episode, in which poor Bran is lamed for life, was riveting.

Now GRRM is in a really odd position. He got so preoccupied with whatever-one-does-when-one's-successful-book-series-gets-filmed-and-broadcast-with-great-acclaim,
that he slowed-down/stopped with writing --
and the filmed adaptations got ahead of him.
Now the filmed adaptations are roughly one series-book-installment ahead of GRRM, and the viewers of the broadcast are seeing plot developments that have yet to be published in book form.

Last I heard GRRM said he was still writing for publication, eventually. Slowly.

I kind of feel like GRRM let us down by letting the story get away from him.