Like everyone pointed out
PR is not very good to compeltely depend upon. Use Kaplan and
OG..I was too confused becasuse
PR start out very good. Its bins also offer tough questions but that is as far it goes. Read the debrief of KilledGMAT. He mentioned some very good points for preparing for a decent 700 score.
Best of luck. I am in the process of doing the GMAT somewhere in August. So far very nervous and reluctant to get a firm date. Maybe this forum will help me get some confidence.