Hey guys I just took my DAT a week ago and thought I'd offer a quick blurb. Regardless of the edition you use, I would surely recommend using the Destroyers. I used the 2013 versions because the 2014 version was not available yet when I bought them. But I found the 2013 version to be very comprehensive if you were looking to save a few bucks. Just like steiner2 said above, I would urge you to get the math destroyer since I felt it was very representative of my DAT QR section if you understood the underlying strategies for each type of question.
I know the destroyers get a lot of polarizing opinions on this website, but I think nearly everyone using their common sense would agree that studying ONLY the questions presented in the Destroyers (or any 1 resource for that matter) is not the golden ticket to a great DAT score. You need to use these books the way they were intended to be used. You need to understand the underlying reasons and relationships of why each answer is right/wrong. The purpose of the book, I felt, was to present the material in question format with the understanding that the user would have to think and learn critically why each answer choice is correct or incorrect. The focus of the books is still
learning the material,
not being able to answer every question if it were thrown in front of you for the 5th time.
I also used Chad's Videos as my first exposure/refresher for GC, Orgo, and QR, along with the Kaplan & Cliff's biology readings,
before moving onto the destroyers. The best strategy for one person is not the best for all, but I figured it was fair to share what worked for me. This was my first time taking it, although I studied my nuts off to make sure I didn't have to take it again. Since it was my first and only time taking & studying for the DAT, I certainly am not trying to be a master of the DAT and the "correct" ways of studying for it. I simply just want to give tips/advice/feedback for anyone that might want it!
🙂 I'd be glad to share with anyone more details of what worked/didn't work for me.

NotreDental