I don't read vampire stories, except in the rare cases (Barbara Hambly, I suppose Terry Pratchett) that they're by an author I already know and trust. Even at that, I didn't pick this one up in hardcover. I almost did, once, but I opened a bookstore copy at a random page and hit a sentence that clunked, so I resigned myself to waiting for the paperback.
Oddly enough, when I did come to read it, I didn't notice any clunkiness at all. Maybe that was because the narrator has a pretty distinctive if not literarily elegant style, and the story carried me along.
( My impressions, with spoilers )