Took EET and I recommend it. Your goal is to hit ~32 in the AM, don't try to review EVERY topic presented.
For me structural was my weakness so I paid less attention to it, instead I try to study other topics to make sure I understand them. This April cycle had a very structural heavy AM and I felt pretty horrible to be honest. I scored a 74/80 on the NCEES practice booklet and thought the practice test was easy (everyone says that closely represents what's on the test) but the actual test was wayyy harder than the practice test.
There are going to be some theory based questions not covered by review courses, I think the CERM came in handy in those situations, make sure you know how to look up the index, and find a workaround to solve those theory questions. I won't list specific problems (because those still haunts me), but I think I got at least 2 questions right by searching through the CERM, even though I didn't look at it AT ALL before the exam and did not plan on using it.
The afternoon test (Transportation) was difficult as well, I would say 80% were covered by EET, the rest 20% you will need either the HCM or the AASHTO book, I didn't have either with me so I ended up guessing on those questions (they were easy too if I had the reference books, because they are simply look-up-a-table-in-that-chapter type of problems).
All in all I think I was either very lucky because my educated guesses worked out, or that I was very lucky that I barely made it with the passing score. Either way I walked out the exam giving my self of a 70/30 chance of passing/failing.