My thoughts:
Most of my experience echoed what
@DilutedAr18 said above. Maybe a few minor differences:
Environment:
The test center was a small office-type space on the 4th floor of a commercial building. When you go in, you take a number and wait while they process people one at a time. When your name comes up, they have an electronic device which scans both your hands (I resisted the temptation to ask if they could use my palm-reading to predict pass/fail). They take your ID and give you a key to a small locker. You put EVERYTHING in this locker, except your ID, glasses, MASK (please bring one in case they don't have extras), ear plugs and locker key. Yes, you may not take your wallet, watch (even if it's not a smart watch), car keys, or anything except what I mentioned above into the test room. The test room has individual desks with computers and it was so quiet, ear plugs were not necessary. There were maybe 6-8 other people in the room when I went. The proctor logs you in, you follow some instructions on how to navigate through the test and online references, and then a few clicks and the exam starts. The timer starts when you start the exam. The test room was COLD (I had on a t-shirt, mock turtleneck and sweater - 3 layers, and I was STILL COLD!), but I tried not to let it bother me. After 42 questions, the exam prompts you to review any questions you have flagged or unanswered (however you can still review any question you want), and when you're finished, it logs you out and you're allowed a 50 minute break. During this time, you're allowed access to your locker and you're free to go about wherever you wish. You're not allowed to look at any exam related material (although if you go back to your car during lunch I don't know how they would enforce this), and they scan your hand every time you exit and re-enter the exam room. The proctors were all very friendly and thorough.
The Exam:
The CBT was simple to navigate and the reference PDFs are simple to access. I tried using "CNTRL-F" to search, but it doesn't work. You must click on the magnifying glass icon at the top left to search PDFs. Simple enough though. I like how you can flag questions to go back to later, and the computer lets you know if you have any unanswered problems, which is nice.
My biggest gripe was with the NEC. You have to use the right "search words" to get to the right sections of what you're trying to find. A few times the same exact word would bring up different results. Fortunately, I grasped the feel of it quickly so I was able to navigate it fairly well. In hindsight, I wish I had memorized a few tabs from my NEC, such as 430.248 for motor FLC for example. At first I had a difficult time finding the conductor ampacity table I wanted, but eventually I got the hang of it. I strongly recommend purchasing an online PDF version of the code books, if such a thing is available.
You're only allowed to bring a calculator (leave the cover behind), so they give you a vinyl/laminated "scratch" pad with several sheets and a black marker. It was kind of cumbersome to use, and at one point I had to ask for more scratch pads, but it worked ok I guess. It was just weird writing notes with a marker.
The exam was very different than the previous pencil/paper I took in October 2019. Some of the differences:
1. There seemed be more "qualitative" type problems vs "quantitative" as
@DilutedAr18 elaborated earlier.
2. There were a few "fill in the blank" type questions, or maybe you're given a diagram of an incomplete circuit or arrangement and you have to fill in the missing items.
3. The qualitative problems ranged from very simple (almost common sense) to very complex (you either know it or you don't, based on how extensive you read different reference books and how much you remembered from all that). Most of these can not be found in the NCEES online reference.
4. However, there were questions and subtopics I either never studied for or came across and yet I could answer easily from the NCEES reference, so there was a balance there. There were a couple of math-type (quantitative) problems I never studied for, but were basically "plug and chug" by simply searching the reference guide.
5. Many problems seemed "simpler" (NOT EASIER, just simpler, as in they required less steps) than many of the PE sample tests I took. The NCEES sample exam comes closest. Other exams such as Eng Pro Guides
@justin-hawaii and Electrical PE Review
@Zach Stone, P.E.'s exams are much more in-depth and do a great job teaching you concepts, but the NCEES practice exam is simply much closer in representation to the wording and style of the actual problems. This is difficult to elaborate on, because without violating the agreement and describing a problem, it's impossible for instructors to know how to help you prepare.
6. I came across more "easy" problems than the previous exam, but I don't know if that's because I have more experience, or the problems were more straightforward this time.
7. There seemed to be a TON of code problems. During the first half, I was thinking, "Maybe they put all the code questions in the first half." But then were a few more in the second half. I would say the NCEES put the correct % of representative topics according to their exam specifications (including protection), but it just seemed like there was an overabundance of code questions.
If I were studying for this exam with a few months to prepare, I would know the NCEES practice exam inside and out. I would recommend taking Eng Pro Guides and Electrical PE Review for practice and learning the concepts, and maybe even a couple more like Graffeo and Complex Imaginary and go through those and try to find as many qualitative type problems as you can. Those are going to be the tough ones where you either know them or you don't and it will depend on how much reading you've done on certain topics.
Yes, you WILL have to memorize some formulas and know your phasor diagrams, phase angles (leading, lagging, etc.). Hopefully after enough practice exams you will have memorized those anyway.
Good luck all!