I cannot remember the details of the mix, I only remember that it was "very nice" (i.e. I had no obvious complaints with it). It didn't blow me away or anything, but it is certainly worthwhile. It very well could be "center channel heavy", I cannot recall, but that might explain why it didn't blow me away.
Basically, if you like reggae, this one of the better albums in that arena. If you're not much of a reggae fan, don't pick this one up just cuz it is surround-sound.