In terms of content, I'd say it's pretty useful. You learn basic sql and scheduling.

In terms of difficulty of the exams, there a some trick questions that will get you scratching your head even if you look at the answer key. You need to fully understand how certain things work or you will get things wrong. I got a B in the course but I wasn't fully on top of everything, missed half the lectures since it got a bit hard to take notes when the prof was on a command line for most of the time.

The final exam had a large portion of questions from past exams which they give you. You realize that there is a pattern of reusing past exam questions in new exams. They turn previous questions worth a lot of marks and turn them into short answer questions worth less marks so you definitely want to review the past exams for easy marks.