In many ways, Sorcerer's Stone is the best of the series. Aside from the books (which were fairly well taken into consideration at the time), they had a blank slate to play with. The cast they chose was fantastic, and they did a good job of translating the story from the book.
I watched this well before reading the series, and so I could see it with fresh eyes that are a great deal more jaded these days. There are additions and changes, but any movie of a book will have that, and the magic and wonder that are needed are there.
I just wish the same could be said of some of the later movies.
7/10