i think that jnj has offered some good advice. it all depends on how comfortable you are with your knowledge, assessment, & critical thinking skills. the nclex-rn is based on the nursing process...& choosing the best answer to a situation that have many correct choices. yeah, you'll have to know a lot about various diseases & their processes...but the test is designed to see what a perspective nurse would do in a situation where they're not quite sure of the disease but would know what to assess for & or anticipate to treat first. there are so many mock nclex-rn review cds that you could use that you should be able to gauge your testing level without having to spend that kind of money for a review.
from what i understand, kaplan now just prepares new grads on how to take the test...they're focus in not based on the disease processes, but how to read what is being asked of you. kaplan, however, do offer some sort of guarantee. i believe that if you don't pass the nclex-rn the first time, they'll give you the opportunity to go through their course again without extra cost.
my thinking is that well prepared nursing students shouldn't really need to go through the kaplan review. if their rn program was any good, they would've had the students take a mock nclex-rn type test like the hesi exam for example.
nursing students should concentrate on the nursing process along with knowledge of various disease processes. if they can keep things as simple as possible & connect what is needed for the patients (assessment, planning, implementing, & evaluating)...along with keeping the basic a,b,cs of what to do first (a=airway, b=breathing, & c=circulation)...then they can tak it from there. for example, a patient with several things going on at once, the thing would be is to know what the nurse should do for that patient first. what are the immediate needs of the patient...what would be needed for them...what might have to be conveyed to the patient/families...etc. look over the choices of answers & follow the rationale & consequences behind each choice...how each anwer might be something that's done for the patients' situation, but, is the one you've choosen the best one (first choice that is) for that situation. i wish i have a better example or way of explaining what i'm trying to say. i hope can understand my ramblings. any road...good luck in your studying for the nclex-rn. hope this help.
cheers - moe.