The Magic Land (the most important guide about Argentina and Uruguay prog, psych and beat bands of the 60's and 70's) says about this band and record: "After the break-up of Opus Alfa in 1972, Bertolone, Barral and Graf formed the power trio Dias de Blues. Their music, and absolutely wild and raw mixture of hyper electric drug-induced progressive blues with social-concerned lyrics, found influences on Cream, Led Zeppelin and Cactus. Their only LP