Amsoil ATD, Redline D4, and Redline racing have all worked well in my TL.
Differences were:
Amsoil gave much better shifts than Z1, quicker, snappier. As it got hotter shifts would get a little sloppier but still much better than Z1.
Redline D4 seemed to have less of a change from cold to hot. It shifts slightly slighly softer when cold but maintains the quality as it gets summer time hot.
Redline Racing.... Totally different fluid, the best shifts yet, not too firm but very quick.