The original LP when it came out in the early 1970s made it largely on the back of the various UK superstars who particpiated (Clapton, Watts, Wyman, and an uncredited Starr together with Wolf and his long time guitarist Hubert Sumlin - Winwood per the notes having been added later and not very succesfully it seems).
This reissue with a full CD of out-takes none of which are filler, an outstanding sound remix and thoughtful notes by the original producer Norman Dayron epitomises just what excellence a special edition CD can achieve where the basic material is so good. The vocals by Howlin' Wolf, given he was not in the best of health at this age in his life and was it seems initially uncomfortable in the different London recording environment to the one he knew at Chess in Chicago, show his true prowess as a blues legend.
While Dayron's extensive notes are very honest in telling how he had to add keyboards esp. by Chess stalwart session man Lafayette Leake in getting to the final release mix, also underline that this was a very rare opportunity for certain British blues superstars to pay true homage to one of their main heroes by providing such stalwart support on these recordings.
Compared with the lacklustre recordings other US bluesmen made with UK musicians around this time(Sonny Boy Williamson with the Animals, John Lee Hooker with the Groundhogs, Muddy Waters in London and the original Fleetwood Mac sessions recorded at Chess in Chicago) this is the true masterpiece that will beat them all.