I had a chance to see it at it's Melbourne (Aus) premiere last night, and it was simply brilliant.
Not a lot of new, or extra content, but enough to notice for me. Little things like some of the slightly longer scenes, and a little more brutality thrown in for good measure. They've done a truly superb job at the remaster. It looks better than I had thought possible. Very happy with the results.
Packed crowd felt great too. It was awesome to be a part of this excellent films history.