My knowledge on tubes is not all that extensive, but enough to tube roll. This unit claims to use nano tubes. Aside from what Wikipedia states, does anyone know much about nano tubes? It sure seems like the unit is basically a solid state thing, but they keep talking about the nano tubes.
IF I were in the market for yet another amp and size and weight were my chief concerns, I could see the possibility of considering this unit. Of course, one would have to also strongly consider all the additional toys that go with it, and that puts the price up pretty close to a good, used Mesa.
Now, if Mesa put out a floor box like this, that would be an entirely different situation.