This is a great album - probably really deserves 5 stars, but I've just never really fallen in love with Leon's voice.  However, everything is right on these sessions, the all-stars (Clapton, Wyman, Watts, Ringo,  Harrison, et-al) really shine, and the songs are top-notch.  If you want to  hear great, funky rock and roll, circa 1970, this is a good reference  point.