This is what hard rock is supposed to sound like.  The song Rebel Rebel, a big hit elsewhere in the world, totally missed in the USA.  Why?  Other songs on the album are also good--1984, Rock And Roll With Me, and the title track were all hits elsewhere in the world.  And with good reason--it's albums like this that keep the music industry alive when all they put out today on the radio is rubbish.  One through listen, and you will be able to see what hard rock is supposed to sound like.  And yes, this is not the type of music that catches instantly but will grow with time.  Meaning the album will have more re-listen value than today's pop or some of the more in-your-face music of the time.