There are many reasons why I like this book, but the most significant of these must be that it confronts the reader and challenges him or her to think differently about the politics of Christianity (and hence, perhaps, politics itself). It is not blasphemous (unless one considers atheism blasphemous a priori) and nor, by and large, does it seek to conspiratorially debunk Christian doxa (unless one counts a fine eye for political context as 'debunking'). Rather, it attempts to wrest the political content of Paul's gospel away from the historical ephemera, out of the hands of the reactionaries, and into a position where we can ask what he can teach us about present cultural entanglements and political impasses. As such I personally think it to be of benefit to the reader almost regardless of whether one is theistic or not: the secularist is asked to consider what Christianity can teach, the Christian is asked to reconsider how to be 'faithful' to their belief. One could even go so far as to say that when set against a backdrop of rising cultural tension, in which religion, faith and 'identity' are increasingly conflated, Badiou provides a rough sketch of how to go about breaking down the barriers.
On an academic level, I believe this book has a unique place in Badiou's oevre too. It provides the reader, through its mix of politics and poetics, with a supplement to the far more opaque and logically based book Being and Event. Indeed, I'm tempted even to say that - although I'm sure Badiou and his more militant followers wouldn't agree - it offers a challenge to the axiomatic schema drawn up in his more weighty offerings.
Lastly, regarding the unfamiliar reader, I would urge them not to be put off by other people's reactions to Badiou's teminology. It's certainly understandable that, when faced with Badiou's description of someone as a 'poet thinker of the event,' a commonsensical individual might reasonably respond with a frustrated "qua?!" Nonetheless, the idea that he seeks only to obfuscate, or even does so unintentionally, is tantamount to character assasination. At his acerbic best Badiou writes angrily, wittily, relevantly, passionately and with uncommon concision. In particular, his short shrift for the marriage between consumerism and identity politics leads him early on in this book into a nigh-on hilarious rant about the limitless ability of the profit-motivated to 'create' identititarian categories of "disabled Serbs, Catholic paedophiles" and "prematurely aged youth," among others. The book is, to my mind, quite possibly worth the cover price for the chance to have a chuckle at that bit alone.