I used this as my main gigging rig for more than two years in a metal tribute band and an original thrash band. Bullet proof reliability, great tone and compact. I usually ran a 4x12 for stage volume but sent the RedBox cab sim to the FOH. It sounds better than mic'ing a cabinet, plus the RedBox is a DI so you can change your stage volume without messing with the front of house volume.
I have started using an even more compact setup so I figure I should pass this on to the next person that is tired of carrying tube heads.

I often had fellow guitar players compliment me on the guitar tone after gigs and ask about the unit.