I disagree with HDStructural about taking the lateral first. I think the gravity is important to take first as it requires you take a deep dive into all of the different materials and understand how those all work. It sets up a solid foundation that you can build off of to then take the Lateral which involves more structural analysis but still has material design involved. Also, all of last year, the gravity had much worse pass rates. (vertical at 26% in October compared to Lateral at 39%).
I had coworkers who took the AEI class for the lateral and I personally don't think it is necessary to pass the exam. I didn't take any course, but did take the exams seperately (which I do highly recommend) and was able to pass on the first try. It seems that the AEI course relies a lot on the binders of material they give you which have shortcuts and tables that you can utilize to essentially solve problems faster. The problem is, for the CBT, you can't bring these binders in anymore. I don't know how they have changed the course since the change, but in my opinion, there are 2 really effective ways to prepare for the SE exam:
1)Solve practice problems.
2)Become intimately familiar with every code book.
By solving problems over and over (especially within the time constraints of the exam) this will help you practice flipping through the codes and thinking through problems quickly. By knowing the codes from cover to cover, and knowing where all of the sections are, no matter what problem shows up, you know where to go immediately. The biggest challenge with the SE is just the time. You have to be quick, which means you don't have time to search for where something is. You have to know where it is.
@Rsd789, Concerns about the steel lateral are valid, but if you take the time to go through the steel seismic design manual it actually isn't too bad. There were a few problems on the morning portion that were pretty basic and then one of the afternoon questions had a steel building. I wouldn't say the exam had a large portion of steel though. I was similar to you with doing a few projects in SDC C but those were usually wood projects, so the seismic steel was a little new. The way they lay out the steel seismic design manual I think is pretty helpful. They have step by step descriptions of many of the problems that they would ask you in the exam.
At the end of the day, I think studying and taking the test was worth it, but it sure was painful during that process. No matter the pain and frustrations of the exam and studying, nothing beats the satisfaction at the end knowing you passed one of the more difficult professional exams out there and propelled yourself into the top of your profession!