I've read the Books, played two out of three Games. The Series takes Stories out of the first two Books, and in my opinion has nailed it!

The most important thing: the main Characters are how they are supposed to be. Of course, there are a lot of things that were changed (in comparison to the Books) but nothing I really mind. The Atmosphere is good, it "feels" like the World of the Witcher.

The negative about the Series: the Timeline ls are too confusing for the casual viewer, at least they should have included the Years when it is taking Place, to make it easier to follow (but such Timelapses shouldn't be happening anymore, if they keep following the Books) And the CGI often seems really cheap. Like the Portals, they are almost non-existent xD

But overall: it's a really great Fantasy Series, also for the casual viewer who has no experience/connection to the World of the Witcher! Hopefully all Books get adapted :3