It was hard to give this a 4.5 because I highly admire packer but found this to be the opposite of what I was expecting. This is a fair critique of the charismatic movement, which is beneficial for any christian. You always grow in your understanding of The Spirit by finding out what He is not. Plus you will interact with these people and its good to know where the Lord is at work and not at work in the movement. Throughout the book he is providing a practical understanding of how the Spirit works in His saints, but no practical/devotional type chapters per say. If you are looking to grow in your knowledge of The Spirits work in our life and how we are to interact with Him, I would look to more simpler works first because of this books technical nature. But I would highly recommend reading it. It was extremely edifying for me, and also a lesson in grace by watching packer disect charismania with condeming them. His statement is "God will work in the lives of those who have an incorrect understanding of His ways even tho He desires a correct knowledge of Himself" So theres hope for the charismatics still! And the rest of us... praise God.