everyone above has said it and i'll just reiterate...gchem texts are the way to go because 1) they generally have a ton of porblems you can practice on and 2) they can shed some light on the concepts that kaplan glosses over (and they are know for this!). i am currently studying from a gchem text for teh DAT and the only thing that sometimes messes me up is that i have a tendency to sometimes delve into the text too far...obviously try not to do this!