I owned one of these and found it very uncomfortable to play down by the first fret; the nut would dig into my hand and it hurt. This thread is making me wish I had tried a little harder to make it work because I really did like how it sounded. Maybe I can track another down and give it another shot.
I filed the bottom of the nut with a Dremel which was a pretty easy fix. Just rounded it off a little bit being careful not to nick the fretboard. Looks a little weird up close but feels great now!