According to me, it was good from the point of view of a person who has never read the book or knows anything about it. From the point of view of a person who has read the books, it was not so good as half of the things in the movie are either wrong or totally different. I would say the same about Sea of Monsters. And I say this to the people who think that the Percy Jackson series (books and movies) are better than Harry Potter series (books and movies) : Harry Potter is still the best.
Percy Jackson is very good but Harry Potter is the best.