Positives:

1:Most of the show's actors do a great job, the guy playing the witcher is terrific 2: The effects are very good for the most part 3: Set pieces, landscapes and the world itself has high quality and is imaginative 4: The monsters are great even if they're rare

Negatives:

1: The writing sometimes pushes characters to act dumber than they are because the writers can't write the villains to be smarter than they are. This is very apparent in the first and last episode

2: The story is messy, with lots of exposition and time skipping. It is a struggle to understand concepts.

3: The rules of the world aren't easily understood, you think you will get an understanding of what is and isn't possible but you never do, they just throw in new things into the mix almost at random, and you get a sense it is there to look cool instead of making sense.