Sabbath's sound and the sound of this Q mix is not murky really. There is some sludge in the mids where the electric guitars are, which is a part of the sound. But if one listens to the drum kit and the ambiance on this album, you can hear the sparkle. The cymbals and hit hat are quite sharp and clear in a rich and appealing way. Planet Caravan shows off the high quality recording and mix quite well. I am speaking of the CD-4 LP as well as the Q4 reel.
Its a nice recording with plenty of range. The only track that has effect not complementary to the material imo is the title track. Excessive ping-pong ruins that one. I would have rated this a 10, but its gets a 9 by me.