I know that this thread's a few months old but since it's out on DVD/BR now...
I finally watched it today (on BR). I'd heard a few bad things about it, mainly due to deviations from the book, but I found it great. As far as deviating from the book goes, well, I read it back when it first came out and therefore didn't remember a lot of the finer details. I enjoying the movie and can't wait for the next one now
I'd give the Blu-ray copy a 4 out of 5; there were some noticeable artefacts but it was still enjoyable. It comes with a digital copy but this is only available on Windows, in WMV