It's really good, and I personally LOVED it. But it's not enough. DAT covers much more than what's in hyperlearning. You'll need to know ecology, evolution, plants, animal biology etc topics. I'd suggest you use cliffs or barron's AP biology in addition to hyperlearning (I used barron's). I scored 27 in bio and I thought applying knowledge was the key to do better on this part of the test than just memorizing details.