This book contains excellent doctrine of creation. It brought about the whole new ideas inside my mind. Especially I liked the thought about God's kenosis in creation and the bringing of several doctrines more closer (for example, one can see better the connection between the doctrine of creation and the doctrine of redemption). This book gave a lot of new resources to build more ecological theory. Moltmann wants to have the Bible and Christian doctrine in the priority position, and so his book is useful even the very conservative readers.
This warm attitude to this book doesn't mean that I would accept all its thoughts. I myself am not panentheist but classical theist and I see no reason why I should think otherwise. It's important to admit that the Holy Spirit can live in the creation, but why the world should be in God? To put shortly, I am not convinced by Moltmann's arguments. Even if Moltmann gives priority to the Bible and the Christian doctrine, there are some philosophical premises. Even if they are intelligent and understandable, I don't see them so reasonable that I should endorse them. For example, the world is in the end necessary for the God (because of His essence) and the God has dipolar nature. These philosophical things seemed me as unnecessary and ethically and theologically harmful. But because I believe that Moltmann's doctrine of creation can stand without these assumptions (Moltmann as panentheist would think maybe otherwise), I am ready to give a good review for the book. It contains ecologically and theologically so refreshing ideas that it deserves it. (See John W. Cooper's "Panentheism: The Other God of the Philosophers" to get a better picture about Moltmann's panentheism and the problems in that doctrine.)
And yet a warning for those who are non-native English-speakers like I: the text may be sometimes quite difficult to understand. But it's only sometimes, and that's why it isn't so dangerous.