I'm running their tranny fluid in my Nissan. Switched it over with 30K miles on the car. I'm at 175,000 now with nothing more then drain and fills every year. Their tranny fluid is good stuff. However, I ran their motor oil for an extended period as advertised and then had it analysed by Blackstone labs and it came back horrable!
My conclusion was to keep the Amsoil ATF but switch back to Castrol GTX.
My lab reports always came back clean with the GTX in the crankcase!