I've got an OLP Tony Levin.
Genuinely nice, comfortable bass to play. Looks good, too, the strings are closer together than on a Musicman Stingray 5, yes, but that didn't bother me in the least.
Nice bass, sounded good, played well.........[i]however[/i], at the price, don't expect a Musicman, cause it aint one. Shocking quality nut, looked like it'd been cut by a five year old. Awful hiss from the treble pot when turned up full, so that had to go too. Once that was sorted, it's a very useable/giggable bass. Not the brightest top end sparkle from mine, but loads of bottom end thump.
I ended up with a Villex pup in mine, making it passive, but with a few tweaks to the stock guts, it's a good bass, and would easily back up my Overwater for gigs if I needed it to.
Tony recorded the song "What Would Jimi Do?" from the Resonator album on one of his Sig OLPs. Wether or not he uses one live, I have no idea.