I'm only vaguely aware of the series, having played half an hour of Witcher 3 many years ago, and have not read the books.

Overall I quite liked the show. I did find it a bit jarring, however, when I found myself thinking the setup was done, and now the show would really start... Then found out that was the last episode.

I'm treating this season like a pretty good pilot episode for the rest of the story, to be told in later seasons.