These are indeed awesome sounding amps.
Channels 3 and 4 are equivalent (more or less) to the Egnater Modular EG3/4....absolutely stunning Hot rodded Marshall Rhythm and Lead tones.
Ch 1 is really Fender Blackface sounding too.
Ch 2 don't know much about.
It's kind of a different (sometimes cheaper) way to get a single channel Egnater M4 with 4 modules loaded.