Not a big deal if you don't like them, they may not be everyone's cup of tea. You'd probably need to be a little predisposed to "primal" music to really appreciate them.
Now if you wan't some music that REALLY pushed the "primal" theme you'd have to check out Crash Worship. They don't translate all that well on disc - you really need to see them live. Imagine a Roman bacchanal, complete with flowing wine down naked female bodies being carried around the room on a liter, huge drums being pounded in manic tempo, fire, smoke and insense burning all about, a half naked crowd jumping up and down in unison, and occasional couples fornicating in dark corners of the room. And that was just in the opening song!