The focus of the course is not so much on the maths but the creative process of solving problems that just happen to fall in the domain of math. I've found these same techniques to be applicable to more traditional 'creative' pursuits as well (e.g. writing music).
It's also interesting in that you get to watch and deconstruct people's thought process for how they approach challenging problems.
[0]https://www.edx.org/course/effective-thinking-through-mathem...
Cryptography I by Dan Boneh on Coursera https://www.coursera.org/learn/crypto I actually can't recommend it to everyone because I didn't complete it and I just wasn't intelligent enough on the material to complete it. This requires one to be good with advanced maths, and I got migraine issues from this (same as with advanced maths in my youth). However it is very well explained. The problem was me, not Dan Boneh's course.
Positive Psychology by Barbara Fredrickson https://www.coursera.org/learn/positive-psychology My significant other completed this course (I have not tried it yet), and highly recommends it. Its on my list.
Securing Democracy by J. Alex Halderman https://www.coursera.org/learn/digital-democracy I thought I was interested in this subject, and I was to some extend, but I was not enough interested to follow the course to the end. However the course as far as I took it was excellent.
Terrorism and Counterterrorism: Comparing Theory and Practice by Edwin Bakker https://www.coursera.org/learn/terrorism I didn't complete this course either but it was interesting and good nonetheless.
There are just a few of the courses I can recommend, and it doesn't contain the one I'm currently one because I haven't completed it yet (will likely include it once completed). There's also courses I cannot recommend (it also depends on the audience). I will resort to the positive angle though wink.
One thing I got from the courses is that it is OK to not complete a course. You can regard it as time waste which is fair enough. My goal is not to get a certificate though. That's merely a byproduct. My goal is to learn (which is a process), to satisfy my taste for knowledge. However Coursera changed its terms of usage last years and ever since I used the platform less.
The maths is fairly straightforward and the concepts are explained well.
Specifically, I take issue with NG's foreign accent. That's just me looking for a reason, but it's the second time after Agarwal on MITx (and that wanted me to purchase his book). Also, I can already record lectures and play them back at will, only I have to leave the house for that. Besides that, these courses were rather classical university courses, it seems.
My gripe is, the videos are too long and my attention span too short. The first 2 weeks I could even pass just from what I learned reading HN, so I suppose I really prefer the socratic method instead of frontal education. Many would claim I was simply lazy and they'd be right, alas also derogitory.