Supposedly it is Larry's take on Andy's favorite JB equipped guitar. I am terrible at trying to describe sound, but I think it is less "hit or miss" than the JB.
I have it in a couple of Charvels (Alder), and in a hard Ash Ibanez.
I feel like the JB works best in dense wood, where it can be too bright in others. The AT seems to work equally as well in all that I have tried.