I spent about 1 1/2 hours with a used one at a GC a couple years back. The cleans and medium gain tones were amazing on that thing, but the modern channel was kind of muddy and had a "buzz" to it that I wasn't digging.
Keep in mind that it was used, and it could've needed a tube change. I know Adam D from Killswitch Engage was using these live with a Maxon 808 in front of it for the end of their tour for The End of Heartache when I saw them, and his tone was pretty good. Then he switched to Mesa.