This movie has one of the best club scenes, very good soundtrack (if you like techno/trance music)
some situations (As the main character Carl begins to take drugs for example) are a little off reality, but the plot is entertaining, but the characters are all a little shallow...
I'd not recommend you to see this film if you don't like techno music
For the plot/acting alone this movie is a 4/10, with the really cool special effects and the club scenes and soundtrack it's a 7/10, but if you would want to go to the movies just to hear nice tracks and grab a little club feeling, it's a 10/10.
the special effects are sometimes hidden, sometimes clearly visible. (i.e. fast moving clouds/sun/moon, morphing background, morphing cuts)
I for one enjoyed it very much, a shame there was no dancefloor in the cinema ;)