I am a bit on the fence on whether to get this right away, in part because of late I have been a bit focused on the Panarion of St. Epiphanius of Salamis. Everything in the Panarion is per se heretical, whereas in the case of the Roman Catholics, we tend to forget that they broke communion with us, not vice versa; I think the wishlist for ecumenical reconciliation contained in the first edition was not entirely realistic or appropriate (it would impose on the RCC humiliating concessions which in many cases do not represent an actual return to the pre-1054, or in the case of Antioch, pre-1078 Status quo ante).
My other concern is whether or not the anti-OO sentiments of Nicholas Marinides have influenced the new book. I stopped reading the O&H blog largely because of his articles (which seemed to target the OOs while ignoring Assyrians, RCs, Protestants, et cetera). If these views are not reflected in the text for the new book I will almost certainly get it.
The original book was very enjoyable, although I also have to confess some of the explanations that followed the descriptions of non-Christian religions, explaining how they differed from Eastern Orthodoxy, were a bit obvious. I would have preferred it had Archpriest Andrew likened them to various unpleasant biological creatures in the manner of St. Epiphanius (for example, I am sure we could mostly agree that Islamic fundamentalism is analogous to Smallpox).