I completely agree with Barron's for Math II, god I hated that book! But for Bio, I actually think Barron's was pretty good...I went through that book first, and then
PR for a kind of review/extra studying, which I think is what helped the most. Because Barron's is kind of intense at times,
PR helps re-confirm what you learned, etc...BUT the Barron's edition that I got came with a CD with 2 practice tests that were helpful because the computer format or whatever was really easy to use like the day before the actual test. I would recommend getting both and running through them if you have time! Flashcards are really helpful too!
p.s. I took the BIO-M if that makes a difference?