Big rock sound!
I own the majority of the Toontrack EZX's plus a couple of the Superior Drummer expansions. This is definitely one of the best EZ drummer expansions and the default kit sounds awesome. It has a huge, thumping kick and solid snare which sounds great in the mix when recording rock, metal and many other genres. The midi library included has some decent grooves to get you started but you can mix and match with grooves from any of the other expansions or simply create your own. Even at full price this EZX is a must have if you record rock or metal but when it's on sale it's a no-brainer!