I did a dedicated 1 week study leading up to the DAT. Prior to that I studied when I could for 6 weeks but it was during a packed quarter of biochem 2, physiology and some other courses. The pro was the physio and biochem course covered a significant amount of the high yield bio material. Also I serves as a GC and OC tutor for a year before this so those subjects were somewhat fresh and there was limited content review I had to do, mostly just focused on questions. With that being said, I would not recommend doing this. I only did so because I was running out of time to take the DAT in order to get my app in. I really did not want to take a gap year.