I saw them open for Morbid Angel a while back, they put on a great show and led me to check out their music and I was pretty disappointed. This was shortly before Demigod came out, didn't know who Behemoth was at that time. I thought ZKC and Satanica and Thelema had a few decent songs between them, but didn't like Demigod at all. Listened to each of the subsequent albums since then and liked each one less.
I still hope Nergal pulls through and the band goes on to tour and such, at least they're a true metal band and don't play some scene garbage. Just really not a band that holds my interest, so the comment that "death metal fans should like them" is pretty silly - especially coming from that guy.