Amsoil Trans Fluid ??

Any one using Amsoil Universal ATF trans fluid?
I talked to a drag racer / motor & trans shop guy who recommends it highly. He runs a couple cars that run in the low 8’s, and said when he switched to Amsoil a couple years ago, the fluid lasts all season and looks like it did the first day he poured it in. Also there is the benefit of less heat, which is always a plus.

I then asked another trans builder his thoughts on synthetics in general, and he said the following; I don’t like them, they are to slippery and have softer shifts.

Anyone have any info would be greatly appreciated!