I've been at JB for over five years. I didn't use any prep. All on my own, a risk I took. If u could afford it, why not do it. If can't, just make sure to go into that interview guns blazing, know as much as u can about the company and be yourself. Don't try to say something u think they want to hear. Be honest and demonstrate how bad u want it. Good luck,,,,hope u guys get it. We have our issues like any other place, but overall a good place to work and get to fly with some awesome folks....best of lucks