The Harmony Central reviews are satisfactorily accurate as far as they go.
The clean channel is predictably warmer than Fender and Peavey solid state amps. But tweaking the EQ can compensate a little.
I think the OD channel comes pretty close to the sound of the Marshall dirtboxes. I remember taking out the Shredmaster from my pedal setup because it was a bit redundant already.
Replacing the preamp tube can improve the sound somewhat.
Overall, I can't complain about anything. But I did sell mine recently. Shift in preferences.
I sold mine for 11k which included a footswitch and a spare Sovtek tube. I myself wouldn't buy one for over 12k, and that's assuming a footswitch is included (a spare tube wouldn't hurt either).