I've got 5700 miles on my big in/big out aluminum TL (David Kee). Only problem was early on with reverse taking a dive. It was probably due to the linkage not being spot on. Other than that, its been great.
I gotta tell you, not having all the weight in the transmission tunnel has really transformed the handling of my car.
I just thought it went well the the aluminum kirkham rearend (no problems with that either).