Incredible to watch, but nothing I could listen to for more than a few seconds. Fretted bass is a pretty crap solo instrument to listen to, to my ears. Tapping metal bass strings onto metal frets, in particular, sounds quite rubbish as a vehicle for musical expression. As above, that he's doing this on an instrument not really musically suitable is the hook here. It's a feast for the eyes as I can appreciate the level of coordination what he's doing requires, and the imagination to get to that level, but just doesn't stimulate me as music to my ears.
And, yes, I've no doubt he's a great musician and could play circles around me playing "normal" bass stuff, too. This kind of stuff, as music, just bores me, though I am not his target audience in the same way a lot of contemporary music also says nothing to me about my life. Just personal taste.