In what follows I'll try to give an account of the book itself, without trying to defend a particular viewpoint. I treat it as a response to Dawkin's "The God delusion".
STRONG POINTS
(1) The tone is wonderfully civil. It's a BIG relief to know that (at least outwardly) corteous and restrained people still exist in this world of shrill, disingenuous and venomous polemics. I honestly don't understand where "Hande Z" could have found the person he attacks so much in the first four, ad hominem, paragraphs of his one-star review.
(2) Ward is honest. He makes clear at the outset the difference between "scientific" and "personal" explanations.
(3) He draws attention to the fact that the several versions of basic reality postulated by physics are as difficult and incomprehensible to us as the concept of God, and perhaps even more so. He also points out that it would be absurd to deny the status of rationally accessible reality to non-mathemathizable fields of human knowledge such as history (and by implication therefore to the IDEA of God). He invokes the right kind of Design Argument, not the God-of-the-gaps one.
(4) He carefully explains in clear and accessible modern language Aquinas' five arguments for the existence of God, while at the same time giving also their original scholastic formulation. He has however an easier time stating the first three than the last two (which are of a "personal" nature).
(5) He neither seems to be swayed by personal prejudices, nor, with a single exception, to be a biblical literalist by any standards (though I'm aware that to some/many people this will seem a minus rather than a plus). In pages 63 to 66 of the PB edition he offers a remarkably frank account of the evolution of the concept of God in the Old Testament.
(6) Overall, the whole book is clearly, if not outstandingly, written, with just two grammatical mistakes (something that is alas nowadays very common and particularly annoys me), and gives an impression of plain sincerity, so difficult to achieve in a field (theology) so slippery and so conductive to pompous and vacuous statements.
WEAKNESSES
(1) In attacking the materialistic outlook because of its inability to define matter, I think he misses its point (as I think does Dawkins, although for another reason), which is simply to assert the metaphysical proposition that the only valid way to study the phenomenic world is by using the scientific method -something admittedly difficult to define- and public evidence as far as possible or reasonable. I'm not implying that it's a valid viewpoint, but only that if the "scientific world" revealed by the method appears to be almost incomprehensible (or even finally unknowable, as predicted by Fred Hoyle in one of his SF novels) to the human mind, that neither proves nor suggests that there must perforce be other independent realms of reality (whatever THIS word may mean!).
(2) His efforts to be persuasive notwithstanding, the book shows the strain of trying to conflate an eternal Creator (which from the arguments he gives seems a very plausible assumption) with a personal, compassionate and supremely merciful God. Again, that's not to say that such an Entity doesn't exist, only that the evidence he gives for it, however morally impressive-sounding, is ... purely personal.
(3) In chapter 7 he cites personal religious experience as a pointer to God's existence. That's perfectly valid, but he doesn't refer to the unitive experience, common to all cultures and religions and unmistakeable universal in character, which is undoubtedly the strongest indication of the existence of another state of consciousness in which the Absolute (whatever THAT may be!) is clearly perceived. Perhaps because it's difficult to reconcile with the idea of a personal God? But Meister Eckart, Jacob Böhme, San Juan de la Cruz, Pseudo-Dionysius the Areopagite, Aquinas himself, etc., all had them and were able (some with some effort) to reconcile them with their Christian faith. By excluding such experiences, he renders that chapter the weakest of the book.
(4) He sidesteps a little when discussing the issue of God's complexity.
(5) In contrast to the rest of the book, the section of Ch. 1 titled "Can we establish by science that God exists?" is (for me) either incoherent or superfluous, and contains besides a sentence that runs counter to the "rational" viewpoint expounded everywhere else in the book. Ward writes: "There are even very good reasons why God might not be a subject to scientific experiments. The Bible says 'Do not put the Lord your God to the test' (Luke 4:12). That seems to rule out experimenting on God. And that seems right, since we would not even experiment on our friends and loved ones, to find out, for example, if they really loved us". But this, if I don't misunderstand what Ward is implying, takes us back the the "credo ut intelligam" of St. Augustine and St. Anselm, a position that Ward is trying to avoid in the rest of the book! Although, to be fair, he says a number of times that this or that argument will only convince someone if he/she already believes. And so we are back to Aquinas' Summa Theologiae. Nothing new under the sun, therefore.
To conclude, Ward succeeds in refuting the obvious misstatements (or fallacies, as you like) contained in "The God delusion", and this in a non-vituperative, not even rancorous, manner.
He doesn't succeed in demonstrating that it's more rational to believe than not to believe, in God. If you believe, perhaps after reading him you'll come away with your faith better founded; if you are an atheist, you can in good conscience continue to be one: Ward will help you not to commit some silly mistakes in arguing your case.
If you already are familiar with the subject, this book is superfluous. If you're new to it, it's valuable.
I use a more consevative criterion of rating than other reviewers. To compare with them, I'd award this book 3 or 3 stars.