Definitely takes up a decent portion of my overall workload with discussion, lab, and exam prep, but honestly isn't bad. I don't go to lectures, can just watch the lecture videos later on 2x speed and works just as fine. The 3 midterms + the final exam are worth 40% of the grade total, so you have a lot of cushioning in your grade. They also have cushioning built in (ex. you can get 112 total points across all discussions, but they only count 100 in the gradebook, so even if you get 12 points off it's still full credit).

Don't let yourself get behind and know how you learn best to get the most out of it. Labs and discussions are easy points so don't waste them. Make notes throughout the semester on things you notice you need a refresher on before exams.