I only used DAT Bootcamp materials to study for my DAT last year, and I mainly just did intensive studying for about 6 days before my exam since I was taking it over my spring break. Obviously, most people aren't going to be in that boat, but I would recommend taking practice exams towards the beginning of your study almost as like a diagnostic. I was able to see which areas I needed to devote more attention to and was able to make a personalized study plan based off of that. Then, I ended my studying by taking practice tests again to make sure my scores were where I wanted them before the exam. For my actual DAT, I did score a point or two higher in each section than with Bootcamp and I was very happy with my scores. I think Bootcamp is one of the best values out there for DAT study materials and you can really customize it and make your own study plan!!