This is a fun sci-fi disaster movie and wisely moves fast enough to keep the audience questions to a minimum. By avoiding specifics the plot is able to adopt a 'here's what's happening, just go with it' attitude that works well enough. Lots of fun sci-fi ideas, most of which have been done before. Like many disaster movies it suffers from character contrivances that put themselves in more danger than necessary, but if that doesn't bother you then you may really enjoy this one.
