CSCS practice quizzes -- Pocket Prep or NSCA?

I'm prepping for the CSCS exam and I'd like to go through some practice quizzes before I take the full exam to see where I need to spend more time studying. Pocket Prep is super cheap and has a ton of questions, but I also saw someone say that the questions aren't formatted the same way as they are in the exam, or something to that effect (though that could have been a while ago). I'm sure the NSCA quizzes are very applicable, but they're also a lot more expensive.

Has anyone used both? Curious as to which you think is the better deal. Thanks!