I bought this for my Kindle after having seen the movie. I have to say, as much as I loved the movie, it's amazing how much is lost without the epistolary element; the way Laclos juxtaposes things -- Valmont's manipulative letters to Danceny's ardent ones, Merteuil's accusations against Prevan to what Valmont actually does to Cecile -- is something that one misses when the letters are taken out of the mix. If there is one flaw to the book it is the heavy handed way in which Valmont finally achieves his great conquest with Madame de Tourvel...after so much subtlety it seemed cheap and melodramatic to use the tactic he did.
This book is certainly dense, and there are entire letters which do not move the plot forward (Danceny's and Cecile's letters to each other are like a musical number in a pre-Oklahoma! stage show: they tell us more of what we already know, but rarely give us anything new) and one gets the sense that some things get lost in translation -- I especially felt that since I'm pretty sure I ran across several sentences that were just plain ungrammatical or generally made no sense, as if they'd been babelfished. However, I would recommend this book to anyone who is interested in a juicy, lascivious classic.