Okay, so first things first. Ms. Rowling is absolutely fantastic at details. She has a true talent for being able to put small things into the story without making them obvious and later have them be pivotal.
I did get stuck more than once because my imagination kept putting a fedora and trench coat on Strike. He was never described that way, but the picture just kept popping in. I think it was the tone of the story.
I think the story was realistic to what a real detectives life would be like. There was a lot of talking, traveling, talking, trying to get a hold of people and then talking to them. It was boring for a good portion of the book. I was almost three hundred pages into it before I got into it and wanted to know what was going to happen next.