So because Jonathan Ross slated it, it's not a decent film. Are you unable to come to your own conclusion on these matters or is Jonathan Ross's opinion the be all and end all to you.

, damn if you were a n00b I could go all day, I'm only messing with you but I've seen plenty of films that were well rated and I thought were crap and vice versa. A good rating in a review is one thing, how much YOU like the film is completely different.
As for my opinion of the film I've only seen a clip of it at the cinema but I think I will see it, it looks quite good.