This is a unique-sounding amplifier. The tones are so rich, that no other amplifier is alike. The amp is small and not as heavy as some other amps. It has two channels and is really easy and a pleasure to work with. It has an attenuator, which makes it possible to play at home while still driving the tubes hot. Another advantage is having the knobs not go smooth but with stops, which helps you always identify where you are in your volume position and enables you to remember the state and go back and forth, tuning the things to how you like much easier and faster.
The quality of the product is beyond everything. It sounds great through the orange cabs and the ENGL cabs as well.
Sound-wise, the cleans are one of the best I have ever heard, besides, perhaps, 5150 EL34 100s. I think they are equally nice, but I prefer the 5150 for some reason.
The dirty channel is just the killer feature of this amp. I cannot describe it; you just need to try it yourself. What I can say is that this particular series (Rockerverb) has something in the low and low-mids that every other amp lacks. This low bite, this powerful grunt and roar. I find this amp so special and unique that I will never remove it from my setup and will always use it, if not the main, than as a complement to my other signal(s) when I record. Just nothing else has it.