One of these guys straight out to the board has been my live sound for the last few years. Mine is loaded with the HD Metal amp pack, which elevates it from "above average" to "really quite good" as far as some high gain sounds go, particularly the 5150 model included. I'm not really an obsessive tone tweaker, I generally find a few sounds I like and stick with them. Before the new amps came out, my heavy sound was based on the Rectifier model, which was not quite as full sounding but suited industrial-tinged music well. I never quite got the crunch sounds where I wanted them, but the clean tones were solid, as are the onboard effects. Can't extol the virtues of these boxes enough in the modern age; it beats hauling around a pile of amps!