when i first found this site i tried to watch every video that i thought was relevant for the DAT. This turned out to be laborous and inefficient. Now i use it only to fill in gaps for things that i am uncertain about in destroyer and sat 2 mathbook. This seems to be fitting better into my overall plan of attack. Salman Khan's awesomeness is of chad-like proportion though. His lectures are clear and explanations are excellent but they are lengthy and there's a ton of content (even in the algebra and geometry sections) that will not appear on DAT.