It just did its first gig last night. I'm very impressed. I'm not very good at describing tone, but it was very quick and responsive. Gain was set a bit past noon, maybe 12:30. Bass, mid & treble all at noon. Graphic EQ bypassed. No compression. Voice filter on 4 (midrange boost centered at 370Hz).
Those settings gave me a very tight low end, obviously a midrange hump, and very smooth highs. We played in a mid-sized club, and I never had the volume past 9 o'clock. I'm up against 3 very loud, distorted guitars, a hard hitting drummer, two vocalists, and keyboards. A rather dense mix. This amp seems freakishly loud for its power rating. I liked what I heard so much, I don't know if I'll ever engage the graphic EQ. It was that good.
Keep in mind this was its first gig, and I'm still in the honeymoon phase.

But again, I'm really impressed with what I heard and felt. My tone was fantastic, and the notes were hitting with a great deal of authority. I don't think I've ever had it so easy finding the tone I was looking for.