I went to the amp show specifically to check out the Mzero, the Bottle Rocket and Curt's guitars (as well as drink beer with a couple of buddies)
Spent probably 20 minutes in the room, playing back and forth with the two guys who were doing the demos, and talking (with some interpreter help) with the owner.
I asked the one guy (Howie) about his demo where he was boosting, and was told that the newer ones had been tweaked, and definitely didn't need a boost (I didn't know what they were running in the loop), but I agreed, definitely no need to boost the current version.
The amps felt fantastic; way more gain than early VH in the version I played. Very smooth playing amps, with a great response, and great feel.
I never got to dial the amp myself, and don't what speakers they were running, but I only had one complaint. There was a certain high end frequency that actually hurt my ears; it only started to bother me after being in the room for a while at super high volumes, and I'm fairly certain it could have been speaker related. Other than that, I loved playing that amp!
Maybe the guys with me (Mark and Henry) could chime in, and give their take.
Certainly something I'd want to spend more time with, in a situation where I had some ability to tweak, and play through different cabs, but with the resale market being what it is, no way I'm taking the leap at 4K.
The guys at the show (including the owner) couldn't have been nicer.
Edited- meant Bottle Rocket, not Cherry bomb