My Boyfriend is a huge Witcher fan, and so we read this together aloud as a sort of bed-time story. so, i had a general idea about the characters and lore going into this. 
I really enjoyed the dynamic of Geralt and Dandelion, I did not expect to like the humor as much as I did. The story is told in a series of time-jumping short stories, with a small narrative throughout that connect everything. I think without any prior knowledge of the series, it could be a little confusing to jump in, but Sapkowski is pretty good at creating an immersive world that is easy to get lost in. 
my one critique is a bit silly, but we felt like he mentions female characters breasts like A LOT. to the point where every time a female character is introduced, you can expect to hear about them. it honestly became a bit of a meme throughout our reading, but overall i don’t think the female characters are poorly written or one-note. I do hope that he continues to improve as the series goes on though!