The Book Seer is really just a combination of several recommendation engines, including Amazon’s. Sure, you could just let Amazon give you their recommendations, but you would lose out on the dramatic presentation and woodcut graphics. Plus, the Book Seer gives you a lot more results than just Amazon’s suggestions alone. It’s also kind of interesting to see how Amazon’s recommendation algorithm compares to the others.
At the very least, The Book Seer will provide you with a time waster for a couple minutes.