I forgot to mention the last Harry Potter movie was in Three D, and we now have three D up here, unlike a few years ago when we had to watch Avatar in two D.
The effect was pretty good. At least everything looked three d, and the color was good, the focus was acceptable, and there were no artifacts. But it didn't really add much to the flick. The three-D glasses are uncomfortable, especially over eye glasses and they show odd reflections from theater lighting.
The director mostly refrained from having things fly out of the screen into the audience's lap. Showing mature restraint on his part.