OK - Muddy Waters is one of my favourite bluesmen, and Mannish Boy is a stonker of a song. And this is a great blues album. BUT apart from a few songs, it's all very same'ish 12-bar blues with the same harmonica howl running throughout. I know that's what blues is supposed to be like (and I love the sound esp. live) but doing that in the 1970's is hardly innovative and I think I can't give this album more than a 3 for those reasons. Muddy Water's voice is perfect though, and the album has a nice rough edge, it's very well (not over) produced IMO.