So guys, my DAT is next week. I have been using Destroyer and other materials beside Chad. I have been hearing awesome comments about Chad, such as "because of Chad, I get 28." blablabla If I get Chad, would I possibly be able to finish all his videos at least one. I feel like I know the materials but afraid that I might miss out things that Chad offers. Should I try to get it or not? I only have til next Thurs. since test on Friday. If you are to watch all gen. chem. and org. chem. videos without pausing, how long does it take to finish all. Also, I thought it is $20, but when I check the site, it is $30. I would love to hear all advices. Thanks