have owned this pre-amp for about 15 years. The clean channel is warm, deep and complex with tons of headroom, and I would keep this amp for this channel alone. The mean channel has a very nice vintage drive to it, reminiscent of old Marshalls or overdriven bassman amps. It's got a nice grind but lacks in punch for the more modern heavy driven sounds. The Scream channel is very versatile, and can do anything from SLO100-type distortion to the more heavy mesa-sounds. mid eq knob has a huge sweep, and overall the EQ settings can make a huge difference in the sound with this amp. I've got the chrome front update, which is for looks only, but if I'd ever find another I'd buy that in a second.