It sounds great! It samples and learns your guitar sound through different mics. Go into a studio a play through a $5k mic for a minute and it saves it. Holds lots of mic sounds as well. Then plug in your guitar's piezo pickup and you got the mic soud or at least a reasonable facsimile. No having to be glued to a mic stand, no feedback, lots of mic choices, etc.
Please check this out and sign up for info. Price and production is likely dependent upon interest. It could really help all acoustic guitar players.
Obviously, if you're happy with mic pickup sound, ignore this!
http://audiosprockets.com