Hi icareon,

I can't offer any perspective on the effectiveness of the products that you're using, but it's probably safe to say that these products have helped other people (to varying degrees). Since it sounds like you're in the early phases of your studies, you should expect to deal with a "learning curve", meaning that it will take some time before you know whether these are the resources you need or if you need different resources. Put your energy into your studies, then plan on taking a practice CAT in the next couple of weeks to gauge your progress.

GMAT assassins aren't born, they're made,
Rich