this movie was absolutely brilliant!
one thing you have to keep in mind, in the end, this movie is essentially a love story, but since Del Toro is directing it, it has it's Macabre side.
one thing more to keep in mind: the 1st half of this movie is somewhat slow, and is primarily used for setting the stage for the 2nd half of the movie, so if you are the type of person who watches a movie and if there's no real suspense or action in the first 15 minutes, you need to wait, apart from that, the rest of the movie is Very good, i loved it, one thing you should know, the movie is ONLY in SPANISH, with english subtitles, there is NO other language for for the movie other than spanish, but if you read on with the subtitles, you'll love it.
this movie is acctually beutifully put together, an early masterpeice for del Toro.
my rating for this movie is a 5/5 personally, but it is not for everyone... so read the back cover before buying it, if you rent it, talk to the clerk and ask if they've seen it, but most people would find this movie fasinating.
Also in the core of the plot there is something that now is in investigation, live/technological interphases are quite new, so perhaps a good vision mind on del Toro side.
Good movie, will see it again.