It seems they mostly have fans in North America and generally are an acquired taste. I understand musically they have some talent, I just haven't heard a single one of their songs I've enjoyed so far, and not in a hurry to listen to more.
I read a thing about Ready Player One (the book) complaining he isn't that good with his writing and mainly lists things he enjoys and things he doesn't. And for the characters in the book, if you don't have uber knowledge, then you are weak.
I'm going to try to see the movie sometime, I also want to read the book one more time, there are bits i'll pay lots of attention to, others I'm skim past the crap bits