Even the 3D was good. I’m still amazed by this:

In the images for the left and right eye, they gave the vampires slightly different pupil colours. That means when you watch it in 3D, the eyes of the vampires kind of shimmer ominously. It works great because it’s only such a small detail. A larger area would be unpleasant to watch.

I’ve never seen another movie doing something innovative like that with 3D.

Edit: Here I found an example that can be viewed via crossy-eye method.