I myself have never read the book but I think the show is fine. It has decent characters and a good plot but from what I have heard, is nothing like the book. Most of the bad reviews for the show are from people who have read the books but coming from me, if you have not read the books yet, then the show is great and I recommend it but if you have read the book, then you might not like it as they are pretty much two different series all together.
The first five episodes were amazing and left you on a rollercoaster but the ending was kind of confusing and sorry for the epic build up that was placed on it. So if I was to say anything negative about the show it would be the ending.
The story builds upon itself and actually doesn’t have any parts of it that did not relate to the plot set at the beginning. Some of the things that happen are confusing and I would love for them to be cleared up in the next season (if they have one) but other then that I love the show and recommend it to anyone