I remember first hearing these guys in an indie station in the Boston-area right after the first album came out. I had already stopped buying cds but just one minute from flip-book made me grab it. THink Don Caballero with the energy of Tool in there. Great gym music but lacking nowhere with traditional "graduate level theoretical physics"-like complexity. Zwei was a little light for my tastes but I do hope to hear more in the future. Check out older Unwound, Don Caballero, Young Windows if you like these. Or, tune in to the Math Rock station on last.fm since they have a great lineup.