From my personal experience
for quant cause u got to remember that the more tough Qs u get right on the test the higher ur score....the kaplan
quant prep chapters offer a comprehensive list of topics that appear on the test.
use princeton for verbal. memorize all the idioms as it helps u to get most of the SCs right
Nothing comes close to the kind of verbal Qs u get on the actual test than the OG, u got to get OG for a good verbal workout.....cause kaplan verbal
is a waste of time , its way too difficult. Even the most difficult verbal Q on the actual test is easier than whats on kaplan
hope this helps....search the forum similar threads , u would find lots of useful info