I took the EET breadth and construction depth and I passed the first time in April 2018. I used the EET binders for majority of the questions during both the breadth and depth exams, I'd say at least 85%. The other 15% came from ASCE, OSHA, etc. I opened my CERM book twice during the exam.
I had high hopes of using the CERM book along with other review/practice books in addition to the EET course, but they just sat on my bookshelf, collecting dust... The reality is that I work 60+ hours a week and ended up not having time to study anything outside of the EET material/practice problems. So I depended heavily on EET and it worked out amazingly. Of course, I recommend anyone to study as much material as they can and use CERM for any random questions. I remember 1 weird word problem I could have easily got right just by looking it up in the CERM's directory... After the breadth session ended at lunch, I only then realized when my friend told me that's how she found the answer. So then I attempted to use CERM on the "I have no clue" problems during the construction depth, which didn't help at that point.
I chose live webinar because I needed the schedule and structure to keep me on track. Only $100 more for both breadth and depth and totally worth it IMO. I missed one session for a wedding and it took me two weeks to catch up so try to stay on track. By the way, from January to April I buckled down and turned into a recluse, did all the weekly EET quizzes/exams/homework, studied my ass off, and re-studied the breadth material during the last two weeks leading up to the exam. The EET material alone isn't going to help unless you put in the effort and understand the concepts or at least know where to find it during the exam. I was also surprised how similar some of the questions were on the exam to the ones in the EET binders.
The instructors are so knowledgeable and engaging, especially Samir and Nazrul. They're also super helpful because any questions I had on the weekly assignments were responded to within a couple hours or the following morning via e-mail.
Best course I could've taken.