Cooler and more useful than I thought it would be. I am not a pick player, but including fingerstyle, slap, and pick is a great idea. I also REALLY like that you included "over 12 fret" (chords and stuff in the upper register), as I, and I think lots of other players, do incorporate that into our playing. I might call that "past the 12th fret" or "beyond the 12th fret" or "upper register" instead of "over 12 fret." "Over the 12[th] fret" makes me think you're playing the octave harmonic, or something similar.
Overall, though, nice idea, nice recording, good presentation.
You might try including text for some of the key features of each bass at the bottom of the screen -- but maybe not. It's nice and uncluttered as is.