I'm a huge Neil Gaiman fan, but this one just didn't do it for me. Maybe because I just can't get into classic fantasy. The main character was fairly two-dimensional and unlikable, with hardly any redeeming qualities, the female characters were treated so badly and were so flat and stereotypical, and the plot just wasn't that interesting. I also found the setting pretty weird and wasn't really able to buy into it. This isn't a critique of Neil Gaiman generally, since I absolutely adore some of his other works, but this one wasn't for me.
I really enjoyed this one. I was looking to read a book set somewhere I know basically nothing about, and this was a great pick for that. It was really beautifully written and all the characters were funny and instantly likeable. While it dragged a little in the first half, the second half hit me like a ton of bricks. I was not expecting to feel so sad for these characters. I agree with the others that the ending was a little unrealistic, but it's not like it ruins the book. I've suspended my disbelief for greater things.
I read this series as a kid and absolutely devoured it. I couldn't believe it wasn't more popular! Definitely too old for it now, but perfect for younger readers.