Honestly if you study like crazy the test will seem really easy. My friend studied like crazy and she got a 23 and the only reason she didn't get a 30 was because of time issues. I also ran out of time on math and pat. I only used Kaplan (I took the online course) and I did the Dat Destroyer (not the destroyer math and not the destroyer for orgo just the basic one).
Honestly, I didn't like destroyer at all. it is much harder than the real dat. I did about half the bio in the destroyer and only 1/3 of orgo and 1/3 of gen chem. I didn't do any of the math. This is because the questions are way to hard and the test isn't like the destroyer questions.
Kaplan was also very detailed. The real DAT was most similar to Kaplan but easier. If you take a Kaplan test, you will definitely score higher on the real thing. I would get 18 AA on Kaplan and got a 21 on the real thing. For me, I know I could have got a 25 AA on the real thing but I didn't finish the math questions (I guessed on 17 out of 40) and I also didn't finish the pat (I guessed on the cube counting and the pattern folding). The science questions were normal. I didn't know what some things in bio were so I got those wrong and same thing for chem and orgo. Some questions mentioned things that I never heard of in my life.
I really suggest Kaplan despite all the posts out there that say Kaplan sucks.