A friend purchased one of their rebuild kits a few years(2.5) back and it was a decent kit. He bought the complete kit minus the converter and their customer service was good and the kit was pretty nice. But don't know anyone who has go their whole tranny set-up though..
I'm in the final stages of replacing my AOD, even though
I've spent a bunch of money and work on upgrding it, with
an '00 4R70W. Finally found a reasonably priced performance converter for the 4R, and a good source for
reasonably priced used 4R transmissions. (all info in the above links)
macxx1@excite.com if you have any other questions or
would like more info that I can help with.