Hey guys. i just took the SAT first time in June 2011 and gotta 1880. My CR is 530 M-660 W-690. I already know how to improve on my CR since i barely practiced for it and im sure i can bring it up 100 points, but for math i heard dr john chungs is the best book if you're in the 650-680 range and looking to get 700+ on the math section. Please give me your opinions on this book. Thanks in advance.