Maybe I shouldn't be posting here, since I'm not a student anymore (graduated in Dec 2001).
I took the live Hurst Review before I took boards and I'm glad I did. She explained a lot of things in a way I could remember them. I only know of one person who took the review who didn't pass boards, and she has severe test anxiety.
But I know a lot of people who just studied books or CDs who passed too. Our dean at our CON suggested we answer at least 1000 questions to be prepared, after reviewing general content.
I crammed lab values the night before the test but there weren't any on there.
My best advice is that if you take a review, take your boards ASAP afterward, within 2 weeks so everything is still fresh. Where I live, the nearest test center is an hour away, so several people rode together and took their tests at the same time. I don't recommend it. The girl that I talked about that didn't pass, she went with several of her friends and the test shut off on all of them at 75, but she kept getting questions. It made her very nervous that she was getting so many questions and that they were all having to wait on her. So go by yourself and don't pay attention to the other people. I personally went to another state to take it (I live in Louisiana but my parents live in Arkansas). I took a couple of days off, drove up, got a good night's sleep and went to a test center where I didn't know a soul. All I knew was two others were taking the NCLEX too (on sign in sheet you had to indicate which test you were there for), but I didn't know which ones. It does not matter which state you are being licensed in, you can fly to Hawaii to take the test if you want to.
My last piece of advice: answer each question as a novice nurse. If there is a choice such as, "this side effect is expected" vs. "get more experienced nurse to evaluate," definitely go with the second one. We are not supposed to be experienced enough to know every expected side effect, etc. Also, always think safety first; on prioritization questions, remember the ABCs from CPR (even if it's not a code situation). Example: assess breathing and apply O2, then start IV.
You can take a break during the test, so make sure you take a snack as the test centers don't always have a coke/candy machine. I read somewhere that it's not the night before's sleep is not as important as the night before the night before's sleep. So make sure you're well rested for a few days ahead of time, eat breakfast, try not to get nervous, and do not worry about the number of questions you get. Most everyone I know had the test cut off at 75, but one of my friends got 120+ and passed, a couple got 80-90 and passed, the girl that didn't pass got 130 or so.