As a primer for those hoping for an overview of the best sci-fi movies to watch, this is not bad, but in my opinion it is marred by (a) an emphasis on US sci-fi movies (as one other reviewer has pointed out, there is no mention of Danny Boyle's "Sunshine", for example) and (b) some egregious omissions - Dr Strangelove, one of the very best sci-fi movies ever made, is mentioned only once in the text and has no main article. Other than that, it's readable and fun, although it does have a tendency to take itself a little too seriously.