Hey,
I highly recommend the course. Much of the material was a lot harder than what you will face on the OAT but it gave an excellent overview and preparation. The full length exams as well as the tests and flash cards (flash cards are wicked for reviewing the day of). It ensures that you will be comfortable taking a computer test (if you havent done it before) and gives you tips (i.e. learn to use the mouse with your left hand so you can write with your right hand, how to organize your scratch paper, etc). I am not sure what you situation was, but I was in my final year of undergrad when I took it, so I needed a good refresher course for the basic chem and bio stuff. I ended up doing well on the test. Money well spent!