Yes totally worth listening to, I loved it! Then again I've been a LOG fan for quite sometime. Anyways regarding the amps, they relied almost exclusively on mark iv's for the rhythm tracks and some solos. Mark Morton recorded most of his solos with a hot rodded marshall outfitted with the "Zakk mod" for extra gain. One thing they did was play with slightly less gain this time around, so that the guitars wouldn't be a sizzle-y. This info is obtained from page 42 of the May 2009 issue of Guitar World.
