Effects were pretty but inaccuracy of the physics annoyed me at several moments; most won't notice. Some of these were key moments in the movie and inaccurate physics resulted in some immersion-breaking (mostly the inaccurate inertia). Good acting, as we would expect from Sandra Bullock <3. Plot is nice; a "single-scene" (my "") film taking you through a specific crisis. I wish the ending showed one step further in time, but the danger felt real and I was along for the ride. Decently good overall.