Depends on the person. It's very "old school" in it's gameplay, and very hard and punishing, grindy, has perma-death, etc.
I'd think most modern gamers would hate it, but I personally like wizardry to games (though it helps that I'm old enough to have played older versions). If you like old school d&d, it's very much in the same vein. The remake linked here is pretty good, I already own it from early access.
It's worth noting that some coursera courses are created and maintained by actually accredited institutions, and some courses qualify as college credit with ACE accreditation. Also, many tech certifications host their courses on coursera too, like microsoft has official azure cert courses on there.
That doesn't necessarily mean anything for any given random cert, though, because that means that the entire site is a pretty big grab bag in terms of the usefulness of their certs.