Sadly due to the lack of availability of 'Open Your Eyes' in Australia (until now) I saw Cameron Crowe's 'Vanilla Sky' first. Too bad. 'Open Your Eyes' is the original and best version, and would have impressed me even more if the surprises in the plot hadn't been ruined for me by the remake. So I strongly urge you to watch this movie first for maximum impact. It's a real killer, and especially recommended if you are a fan of mind-blowing movies such as Frankenheimer's underrated 'Seconds', Cronenberg's brilliant 'Videodrome' and 'eXistenZ'), or have read a Philip K.Dick novel or two.
Eduardo Noriega (star of Amenabar's previous movie, the taut, suspenseful 'Tesis', also worth a look) is much more believable than Tom Cruise as the increasingly baffled protagonist caught in a never-ending nightmare, and Penelope Cruz's performance here is subtler and more appealing than her reprise of Sofia in Crowe's overblown and self-indulgent remake. Alejandro Amenabar has made three excellent imaginative thrillers in a row, and looks like being one of the most potentially exciting directors currently working. 'Open Your Eyes' comes with my highest recommendation. This one is essential viewing.