I was an indifferent Engineering student. I spent way too much time socialising and not enough time studying. Lectures frustrated me and in hindsight I think the lectures frustrated the lecturers even more. Highly intelligent professional engineers who were bored almost as much by the basics as we were.
We focused on the exams and on our project work. The effort put into any chapter was dictated by the syllabus. I eventually qualified, I think they eventually got bored of seeing me around and I co-operated by memorising enough to jump through the hoops.
But I eventually got a real engineering job and "Marks" became my best friend for years. The one really disturbing thing about academia is that they rarely tell you what is really really important and what is not. But a book like Marks is forced to concentrate whole semesters into one or two pages. It does this really really well, If I knew someone going to college now I would give them a copy of Marks and tell them to study the topic at the beginning of a term so that they could get an eagle eye view before getting bogged down on the nitty gritty.
This is the edition I had, the text was not in SI but as I was working in the US at the time this was not important. I still pull it down every so often. I now planning to get the latest edition, be interesting to see the progress in the world in the last 20 years.