Looks good, but having used it for the first time in a 2.5 hour gig, I can't really see/hear what it's meant to do (other than to deprive me of £8.50 of course ...)
I've tried it on and then just forward of the nut, but I still can't hear any significant difference from when I haven't got it on the bass (a Fender Jazz, through a Hartke 350watt rig if relevant).
I've now used it for another couple of gigs. It's crap. It doesn't do anything (except of course to deprive you of the £8.50) ...