CU Boulder advertises the resulting degree as indistinguishable from their on-campus program from a records perspective (you're even invited to the graduation ceremony afaik). How much truth there will be to this, I've yet to see.
I don’t necessarily doubt them, but it still just feel off. Why can’t just anyone enter their on-campus program and prove themselves the same way? If they had some more courses focused in certain areas I’d take a more serious look at it though.