How does it sounds? The rhythm channel goes from a clean booster to a very natural light/mid high drive. It respondes very much like a real tube amp. The lead channel is a hard to explain sound. At first I thought it doesn't had enough gain for a lead. I think I was too used to Jekyll & Hyde. Once I get used to it I fell in love for it. It has that classic sound you here in southern rock band like The Black Crowes. A little fuzzy but in a good way.
Here you can hear the lead channel of the SFX-03 throught a Fernandes Strat in the bridge+middle PU position through a speaker simulator recorded on a PC (lead guitar about 4:00min).
Now that I'm used to it I find the J&H a little "muffy-er".