I just came from seeing the movie and it was great! Really. Although the names and relationships of the caracthers were changed, as well as location, it was ass faithful to the game lore as possible.
I saw some critics saying it had to much videogame aspects in it, I say thats exactly what I would expect from a movie based on the videogame, all the moves were reproduced in the movie.
The story was well told and since the respective game of the series is a bit old already I forgot enough to be kept in suspense many times, although I identified the major villain even before the opening credits. But I had forgot about the ending so that was a surprise, it just clicked in my head afterwards. Some bad parts here thou, some cliches like the love story, caracther laughing and something terrible happening afterwards, dropping guard and being attacked. Hollywood should have got over these unoriginal ideas decades ago already.
The acting was good I have to say. Jacob Benjamin Gyllenhaal was well as the prince but should have kept his natural American accent, I could swear he swinged between English and some sort of scottish accent along the movie.Maybe they wanted british accents to be faithful to the game.
In my humble opinion I give it 90%. Will definitely own the DVD.