Don't underestimate anything because people have failed it and remember that you have to wait 3 months to retake it. It's better to be prepared then not to be prepared. Never rely on other people's words bc when you do bad who will save u? no one. I've heard of people barely studying and thinking it's a cake and failing it and having to wait 3 months and losing their grad. jobs, etc (remember retail and some residency give you a time limit when to get your license, typically 90 days from the day you are elligible to sit for Naplex).
Remember there can be alot of tricky questions and you can get questions that you aren't well prepared for like TPN, etc so take the time to study and do it right the first time.