In my opinion they arent REALLY good at all. I've heard PLENTY better for sure. I think I only like one of there songs, that I've heaRD SO FAR.
If you want to listen to some bad ass fuckin metal, go listen to Juggulator- Judas Priest
Or any album by Death (Chuch Schuldiner)
Ohh and AZ. no offense to you man, just sayin what was on my mind ;)