I'm using them as a supplement, but just touching on BR chapters a little bit. Using the practice passages though, and yea he hasn't finished all of his bio stuff, that actually just recently became available. I haven't even gotten through them all yet. He said his vids aren't the best for bio, but I still find them helpful because I'm a visual learner! But I have no idea if that's the 'right' thing to do! I'd love some input from ppl that have taken MCAT with Chad as to whether this can be considered a full course or if we should still be spending some considerable time with other books...!