Yup! WAY cool! They FLY is a fantastic guitar in all respects, even without the midi, but i like having the 12 strings, detunings and .. yes, the banjo!
some great midifly info here:http://www.soundonsound.com/sos/dec99/articles/parkermidifly.htm
Every instrument, every voice, every sound in nature ... these are are all my private tutors ... 24/7 for free, and all I have to do is listen.