i'm taking the PR right now because the post bac program I'm doing offer it. However, I like the kaplan book much better. Also, I think that PR has better teachers. They have special instructors for every subject, not one guy does it all like Kaplan. I think Kaplan is too cheap.
I haven't taken the real dat yet so i can't tell how good PR IS. However, after 3 weeks of pr prep, I took the topscore pro and got 15 average, 20 PAT. Just note that the pat on topscore is super easy.
T