I cant agree with the other reviewer. This is second tier heavy rock from the 70s. A bit Black Sabbath a bit Tull a bit Blodwyn Pig, but not as memorable as any of them. The riffs are pretty generic and derivative. They cannot be compared with Black Widow because there is very little keyboard on here. It is mostly riffy guitar rock. Not really a lost classic, definately not essential. It seems you have to be very careful these days as 70s prog rock has become the marketing mans gold. There is so much more music out there that should be heard before this. Not to say that it is bad, but not a keeper.