The Nickelback thing would also put me off, but, you know, sometimes decent musicians take mediocre gigs. The demos seem ok and the emphasis towards heavy mid-tempo stuff is pretty much well-suited for my type of music.
The web site says: optimized for 1 kick, 1 snare, 2 toms, 1 floor-tom, 2 crash cymbals, 1 ride cymbal.
So I guess that, with such a basic configuration, it should work w/ most of the expansions.