http://movies.yahoo.com/news/gravity-reviews-critics-call-alfonso-cuarons-space-adventure-142026054.html
It may have been filmed in front of a green screen, but The Hollywood Reporter's Todd McCarthy said that the space sequences are so realistic that audiences will swear it was shot on location.
"At once the most realistic and beautifully choreographed film ever set in space, Gravity is a thrillingly realized survival story spiked with interludes of breath-catching tension and startling surprise," McCarthy wrote.
For Variety's Justin Chang, "Gravity" is the kind of evolutionary step forward in film that is guaranteed to inspire a sense of awe in viewers. Its achievement in the realm of visual effects and 3D puts it in the company of "Life of Pi" and "Avatar," he maintained...
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I am excited at the prospect of this movie...