Not too easy. Not too difficult.
This course is rigorous but the professor is probably the nicest professor you'll meet. I myself enjoyed the curriculum although it more of a survey of different DE techniques. I was a nice blend of theory and application. There was an amount of work consistent with any college math course, but it was never unmanageable.
The biggest highlights were 1. The lecturing style of the professor, and 2. The structure of the homework. Concerning 1, the professor I had was incredibly knowledgeable and understood that what he was teaching is tough stuff. Concerning 2, the online work was assigned at the beginning of the semester and only the pertinent units online were due before tests. He gave out the paper assignments about a week in advance and encouraged (active) groupwork. He really ensured that a student was given enough time to learn at their pace.
Hours per week:
Advice for students:
Like any other class, do your homework weeks before you need to. Alone. If you're stuck on a problem, you have the internet, friends, the library, and the professor to help you out. Never think that a problem is unsolvable. Many students have been in your position, and many more will be. Don't think you're the first person with a "stupid" question.