Michael League has been using this on recent tours over his TTE 500, most likely due to it's smaller size and therefore easier transportation. Can be seen on most recent live videos - but can see it in high quality during the performance they filmed for Dunlop: https://www.youtube.com/watch?v=IE9I6NrE2S0 (there's a pan shot at 3:20 where you can see it)more
Reliable. Great tone versatility. My only actual criticism is it being a bit quiet in a an 8ohm cab, which probably isn't the case with the 800w version. I usually keep mine almost all the way into the tube blend, then run it through a guitar 4x12 for some DFA1979/Royal Blood-ish sounds. Breaks up wonderfully for a transistor power amp, and light as anything. Save your back, get a Little Mark.
Tube warmth is the finishing touch on an otherwise already perfect amp. It has a musical 4-band EQ, two inputs (one that supports XLR connection from an upright-type pickup/preamp including phantom power switch), adjustable line out send, FX loop, and two extra MarkBass EQ settings: VPF for an adjustable "smile" EQ, and VLE which simulates old amp sag and high end loss as you turn it up, for a vintage sound. It weighs only 8 pounds but has monster power, with 800W into 4ohms. I use this amp for virtually every gig now.