I love the series and I shared my books with 3 more people. Opening day of the movie was Friday and I had a lot of fun watching the movie with a few friends. All who watched it, loved it. The movie was a bit different than the first book. However, I've come to appreciate the differences in media between the printed text and a moving picture. Not everything translates well between the two. Differences must occur. That being said, There were things I was dissappointed about. There were characters I missed and some changes that I felt were out of character with the overall world created by Riordan.
Would I recommend the movie? Yes.
For people who loved the books, keep an open mind. For people who haven't read them, you get to watch without syncronization issues, so enjoy it.