The concept had potential, but the execution is just another muddled, predictable, credibility-stretching sci-fi thriller formula. Robin Williams is miscast in the lead, and the supporting cast is forgettable. A handful of inventive ideas are never handled with enough weight or imagination to have any impact. Not really worth the time.
The idea's brilliant and so is Robin Williams's performance. In my opinion the plot is a little bit predictable and the full potential of the great idea's not really carried out. The movie is a must-watch anyway.