I've used many different science programs over the three years I've been hs, and while some have been good (and some not so good!), I really think Apologia is one of the better ones out there. If you don't believe God created the earth, or if you don't want to take the time to explain that every book written is influenced by the writer's personal beliefs, then it may not be for you. Academically, it seems sound. My daughters are learning a lot - including good study habits and critical evaluation - from these books. I like the fact that the author also makes clear that he has personal beliefs, and while he tries not to let them influence his writing, that the reader should evaluate and make their own decisions (particularly on young/old earth, catastrophism/uniformitarianism and other "hot topics"). That is only in the higher level books, however. In the elementary books, you need to make that clear to your child. This has never been a problem for us, because we take that approach with all of our schoolwork. History, science, literature, all are written by humans, and all are subject to their viewpoint. Read 3 books about anything, written by 3 different people, living in 3 different countries, and you'll get 3 different stories! It's up to you to piece it together.