[estefan]

I always just audit the courses. I'm doing them for my benefit, not for a certificate. I might buy the lecturers' book though as a thank you.

Pro tip: Use the mobile app, download the videos and watch them at 2x speed to save time :-)

[GeorgeHahn]

Pretty easy to download on a desktop as well: https://github.com/coursera-dl/coursera-dl