I seriously couldn't fault it, the plot, action and effects were all top notch. Hiccup's flaming sword is pretty awesome and his dragon has a cool upgrade. The plot flies along nicely and adds some great depth to the first movie. I still can't figure out why Hiccup has an American accent, as opposed to the other thick accents, but it's easily overlooked. 5 stars from me, go and see it, cheers, Kasper.