Those who enjoyed the initial How to Train Your Dragon are certain to find this installment equally delightful. It’s a film that will undoubtedly inspire lots of .gif creation among Tumblr users. Even for those unfamiliar with the earlier movie, enjoyment is still likely, or at minimum, appreciation. Fundamentally, it's a very good movie. It contains everything a young viewer could ask for (and I can attest to this – the children in the audience seemed to think so, and it was quite charming), and there were also some genuinely funny parts for the adults present. The story is decent; while the progression of events might be foreseeable, that predictability ultimately proves effective. Visually, the animation is stunning. The voice acting is superb. It’s clear that the characters have developed considerably over the five-year period between films, and this isn't just visible in their looks but also reflected in how they act with each other. Regardless, it proved to be a thoroughly enjoyable experience! I suggest seeing it, even if you don’t have children.

Source on TMDB