I know of their mics, but I've never heard one or anyone talk about them. Then again, maybe it's because I've unconsciously crossed them out. A few years ago, I had a beat-up and dead U87i (NOT Ai) snatched from right-under my nose on eBay. That's far and square... Turns-out to be an employee of Tracy Korby and he contacts me to say I can buy it for $2500 refurbished! That was rather too sales weasely for me... And I woun't pay any money for a reburbish or mod on a U87 from ANYONE but SPA. Tracy Korby most likely sticks a new Ai capsule on most of their reburbished U87s... Yes, the capsule did change slightly... Something Neumann claims it didn't do and would rather you not know...
I'd buy something from Bill Bradley any day!