I've sung the praises of this set before. Through the years I've had this material on Riverside (10 and 12 inchers), Epic, Parlophone, Smithsonian (all lps) and cd sets on Music Memoria and the set under discussion. The Off the Record set is really special. The booklet alone is worth the price of admission. Let me also recommend a Frog disc called "Blues Singers and Hot Bands on Okeh" for a collection of fine sideman recordings by Mr Oliver.