I bought three of their albums when I first heard them from random mp3 (this was back in '03). I thought they had alot of Savatage flavor in the heavy parts. When I got the albums though, I found they were more in the Dream Theatre vein. I thought the melodies they wrote were really cool, but there was just too much of that "DT proggy" sound for me. And it's true, they're not really very heavy, just a few songs here and there (the ones I downloaded it seems). They are closer to the Porcupine Tree side of Prog. If you like that kind stuff, it comes highly recommended from me (probably start with the albums "V" or "Beware of Darkness"). Out of that style of music, Spock and the Porcupine head my playlists.