It is also worth noting that while Jørn Utzon's design for the exterior of the building was adhered to, the interior (presumably also 'radically' styled in Utzon's original plans) was redesigned by nameless others.

Having sat on the stage of one of the halls for several hours (in a school choir performance...) I can comfortably say that it is not as interesting to look at from the inside. Unless you count a very strange four metre wide translucent brown doughnut suspended above our heads, intented to improve acoustics.