I personally cant stand their first few albums, but their latest album I thought had some really good guitar work. Not necessarily technical, but moreso the mood/atmosphere they are creating is awesome for me. Sort of resembles Black Sabbath. And honestly, I havent really heard a band that came close to a good Sabbath-influenced-sound besides these guys. (Definitely enlighten me is you know of any other bands...)

http://www.youtube.com/watch?v=7Pm16ythlec

http://www.youtube.com/watch?v=_i65fMJh2pg