I have no doubt it sounds good.
The only comment is, is it necessary? Without opening up the debate,that is an entirely personal view of course :).
Just as an aside, our other guitarist who uses a Helix, started switching to using a Marshall Amp and cab on stage. He recently did a rehersal without it, reverting back to the SS amp he had - it was noticably better. Why? I suspect its because he had spent quite some time tuning his sounds to SS.
So my point is, we have these very powerful valve amp emulators. If you use them to their full potential, personally I think the valve power amps become redundant and therefore unnecessary. HOWEVER, of course many people prefer the added colour of valves and it adds a dimension, and that is perfectly valid as well.
The great thing is, we have the choice!!!