See it if you are interested in anything Dorian Gray, liked The Picture of Dorian Gray, and do not mind a confusing story and over the top characters.
Don't see it if you prefer a well developed story and relistic characters.
See it if you have no knowledge of the story/film, or if someone is paying you large sums to see it, and buying you dinner.
Don't see it if You have anything at all better to do. I must admit I left at the interval. It was intellectual/emotional self-flaggelation.