This is about as close to "Hell no!" as I'm likely to get for quite some time. Epistolary style novels do not work for me; I find them annoying, boring, and rarely finish them. In the book's defense, I didn't realize what this was when I bought it or I'd simply have never tried it.
It came as little surprise to me that S&S was originally styled as an epistolary novel, only writing the book in so convoluted a manner explains why the plot goes in more circles then me attempting to drive in a roundabout.
This is probably not a bad book, I've read others by the author I liked, but it's definitely not for me.