They have played their very best. "Behind Closed Doors" seamlessly from the predecessor "Laughing On Judgement Day" and "Backstreet Symphony" and has re finest hard rock, which is influenced by bands like Whitesnake, Deep Purple and Led Zeppelin. There are a balanced mix of powerful rockers and anthemic ballads and semi ballads here and there is sometimes the radio through. I find on the album not a single weak point. Excellent!