I took the online course and felt it helped me. You get lots of great materials from the course and it is helpful - but it is expensive. You can do it on your own if you are focused, but if you have the money to take the class I would recommend it - I think it helps to have the materials and practice tests along the way and a set schedule that helps you to cover all of the areas you need for the test. If you feel you already really know your sciences well and what you need is more of a review then go with the kaplan blue book and DAT destroyer.