I bought one for my 71 Camaro/LT1 FI swap to mate to my TH350. Pricey but from what I understand it is WELL worth it. I frequent the 94-6 Impala/Caprice LT1 boards a lot since these are my other car hobbies and the Edge 9" lockup converters (even for street use) are regarded as the best choice at $550 even to the might Vigilante $700+ converter. Supposedly comprable in performance for much less $$. I'm even in a car club where a couple guys have these and they say it is night and day difference from having a cheap converter versus a good one like an Edge.
Very good reputation in the LT1 community.
I have yet to do my swap so I can't comment on personal use unfortunately. But I think I'll be pleasantly surprised once it all goes in.