Is this a Tube amp? Valves = tubes, right? (Newb question)

What would you all say this amp is worth used?

Heres a link to GC brand new.
"My friends, we live in the greatest nation in the history of the world.
I hope you'll join with me as we try to change it." -- Barack Obama

''Life's tough...it's even tougher if you're stupid.'' -- John Wayne
people are gonna tear you a new asshole with their little *reported*s because it's the wrong forum. But everyone ever praises the amp for it's sound and it's ease of customization/modding. I'm getting the half stack version one soon