I've had a MKII for a couple months, the cleans are awesome. The gain can be a little fizzy through the Greenbacks in my Friedman cab but the V30's seem ok...I'm working on getting a matching Orange cab with all V-30's and I think I'll be happier with that. I've dialed back the gain and treble a bit and that helps. It tightens up and sounds better as the volume is increased. The Mailman mentioned being able to dial out the fizz on his MKII with the cabs he's using.
If you can get a good deal on on I'd recommend at least giving it a shot, you can probably flip it and at least break even if you don't like it.