I have owned several tube-amps, both 2x12 combos as heads with 4x12 cabs from Marshall, Mesa and Bugera.
This little Marshall blows me away, probably the closest you can get to one of their tube amps at a low budget.
Most interesting is how accurate it reacts to volume and tone changes, the better the guitar the better it seems to work.
The factory presets are pretty good.
For using the amp only live I would recommend getting the big footswitch: that said, I still prefer my Orange Pro 120 with pedals over this though.