Just saw it. It is good, very intense. The 3d is not bad except for alot of little matte lines, and the fact that it is fake. It is nicely used, for what it is, but it is still fake. I loved the camera work outside of the 3d. The DP is one of my favorites for a reason.
It was an interesting experience, though I was a bit queasy when walking out of the theater, and the relentlessness of it grows a bit tiresome. I hit the limit just a moment before the thing was over.
The movie is ninety minutes for a reason. 5 minutes more and I would have shifted from enjoying it to hating it!