I think it was a great movie. Not as good as it could have been but still really good. I don't really know how you feel about it if you haven't played the games' though.
They took some gaming aspects' and put those in the movie in different ways'. This makes the movie rather unique from other movies' (I've heard that other movies' based on games' do the same but this is the only one I've seen). I don't know if this makes the movie better but at least it's deffinately different and intresting.
The sound, lightning and the presentation of the story was really good and very true to the Silent Hill-concept. Two thumbs up for that