I liked this novel. It, so far, is her best of the series in my opinion. My favorite chapter has to be, Eighteen: Moony, Wormtail, Padfoot and Prongs. You can certainly tell how much better J.K.'s storyteling abilities are becoming with this third installment. She's weaving a very clever tale and I loved Harry's nightmares in chapter 15 the Quidditch Final. They were brilliant.
I'm now ready to begin one of the "epic" tomes (700+ pages). This will be a new experience for me since I only got about halfway through this book the first time I read it before having to set it aside. All the Potter books I will now be reading for the very first time. I am excited.