The main frustration I found with this was working out the settings in the
face of a useless manual. This site gives a good run down of all the
settings:
http://homepage.ntlworld.com/jim.press/guitar.html
I'm still working on presets, currently the Fender twin, pretty good if you
want a really bright setting with decent harmonics. Usual disclaimer - this
is running through a good clean tube amp, I have no plans on using it for
recording.
Tony D