Intense. Stunning. Phenomenal. List pretty much any praising adjective to describe Gravity and the acclaim is warranted.
Michael Bay is notorious for his superficial approach to filmmaking -- it is all about looks. Give him a World War II epic, a catastrophic event, or a terrorist plot for destruction and he just skims the surface of the human condition. Give him jacked up, directionless, simple-minded body builders, and he gives you characters you can't help but be invested in.