this and Destroyer is one of their best albums, they had that hard rock feel with the powerful guitars which along with Sabbath, Grand Funk, The Cream spawned a whole new genre of music which is basically the continuation of 70's hard rock, and it was the father of Grunge in the 90's, today it's known as Sludge/Doom/StonerRock check bands like Melvins, Sleep, Fu Manchu, Clutch, etc. for sounds that were inspired by KISS and other bands of that time.