I took this course a while back.

It's not really groundbreaking or anything but I think it's useful.

Wouldn't put it on a MUST TAKE IT course list but it was worth it's time :)

Will teach you the scientific background behind your current learning strategies so you can explain them better to yourself and your friends? - Yes

Will it give you better strategies to learn? - Maybe.

Will it make you reflect on your learning style? - Yes. Maybe this will help you learn better, which is obviously an insane return on investment over your lifetime.

Depends. There's absolutely fundamental knowledge in here that will help you learn and retain better. But a lot of it is out there already.

I'd say it's a must have because it's easy and helpful. It's organized so that it's easy to take. I guess that shouldn't be surprising.