I did really enjoy this book. I've never read a book like this and I found it educational as well as entertaining. I'm much more versed on psychics now! I might ask for a divining rod for my birthday! 
 Though it wasn't particularly fast-paced, I read it very quickly, maybe in two sittings. The writing was very smooth and had a good flow. 
 What I found great about this book was the characters. Each of them has their own realistic personality which is shaped from their upbringing, e.g. Gansey and his cavalier attitude to money, and Adam's refusal to accept help to get away from his family. It made them much more complex and likeable. I'm not really sure on Blue but maybe I will be able to form a solid opinion in the next books, which I definitely plan on reading. 
 Would recommend (even though I'm about three years late!)