i got one and......... its 'kin great IMO! im using it with a genz benz 12,2. it takes a bit of tweaking and some of the controls are quite sensitive (move it a mm and the sound changes a lot) but all I reckon:
a) I can get a better sound out of it than my K&K
I can get a wider range of tones - a nice woody sound to a very 'electricy sound'
c) It seems clearer over all
d) it has a tuner - i have lost so many tuners on gigs (i recon over £120 worth of tuners over the years!)
e: it has a phase on sub filter - which will help feedback fighting
f) it doesn't have that horrible jack attachment that damages your strings (the k&k caused a strng to snap on a gig once
when i first got it, i took off my k&k, assembled it and thought it sounded 'ok' but not much better than my k&k. i tweaked it for about 30 mins than put both pickups on the same bass and A/B'd them and ..... woah the shadow was WAAYYY better!
I dont know why shadow are using that horrible video to promote it. Anyway, hope his helps