To be as short as possible. It's pretty decent, with some minor problems.

The good: Henry Cavil it's really trying to be a good Geralt of Rivia, you can see he dig the character and doing his best to bring a faithful version of Geralt on the screen. Ciri and Yennefer are also decent, their acting is on point most of the time and their look it's pretty faithful to the books and games. The story mostly follow some of the most story relevant chapters of the first two books (which are a collection of short novels, with here and there events that will be relevants after, in the saga). The musics are good, and the dialogues and overall feeling is for most parts that of the witcher saga. The fights have good choreography that reminds of the fight in the games. The direction is mostly good, not something out of this world but it's still well built. The special effects are not always perfect, but they hold well enough overall.

The bad: Ok, time to talk about the elephant in the room. Some obvious miscasts: the worse of all is Triss Merigold, for her they chose an actress that really is as far as possible as her description in the books and her image in the game (why always the redheads?). Also, too many black actors; while per se is obviously not a problem, when you cast actor you should always ask yourself for what roles are you casting them. If you are filming, for example, a film about ancient viking, you shouldn't cast half of them as black people. But we live in a time where casts must respect quotas even where it's against the logic of the story. Here it's a bit of a problem because the witcher saga, even if it is set in a fantasy world, its' a world that traspose slavic and north european myths, folklore and populations (in the books the northern kingdoms like Redania and Temeria are slavic, the southern kingodms like Nilfgard are germanic, the supernatural creatures are described as in the slavic folklore with a pinch of tolkien). Since this is supposed to be a medieval northern european kinda of fantasy world, seeing all those ethnicity that aren't supposed to be there break the immersion a bit. It's not so big of a problem that will make you stop watching, but it's something they could and should have avoid, but decided not to to be more inclusive/PC. Let's be happy that the main trio is cast right, i suppose.

So, in the end, should you be watching this series? For now, i would say yes, indeed. Is this a good witcher series? Yes, as i said in the beginning it's a pretty decent transposition. Is this a perfect transposition? No, and sadly because if they wanted to they could come a lot more closer with some simple casting choice.