I use that stuff in my car. I have to say never her peep or late shift from the tranny even on occision abuse the tranny.

I did a filter/ fluid change about 1K ago [I was starting to get a little slippage], & used the Valvoline Max Life myself. My problems went away [but I can't guarantee it was the brand of fluid that did it or just the fluid/filter change].....I plan on dropping the pan again in another 1K to change the fluid again & will probably use the Max Life again...
How can it hurt? It meets manufacturers specs, after all...