There are a lot of metal packs from many great companies - Toontrack and FXpansion having the most impressive libraries at 250+GB per....
Now, that really is impressive, and extremely complex - but you know what not only do I not have that much space on my HDD just for drums, I don't need or want anything that close to that amount of space and tweak ability as a guitarist who uses drums because I can't play and don't know anything about them.
To me, these presets ($90) rival SD3's Death and Darkness ($150) kits, and I like them More myself honestly. They are definitely just as good, and when on sale, they are like $40-50, so 1/4-1/3 less than SD3.
Most of all you can get XLN addictive drums 2 with this and 2 other packs ($90 each, so $180 In value alone) for $170. so thats $220 in libraries and the program itself, which should cost like $100 stand alone, comp. in value to SD3 easily, but at a fraction of the cost....
if your into a metal drum VST, and you want the best for your money, and the best VST for metal drums in general, this is your pick.