I too read this ad today and was interested in the product. The price is right compared to the other brand but I would like to see temperature ports, especially on the transmission. The two extra quarts of transmission fluid would help some. I think that is only about 12% more fluid. I wonder if the 0. 8 quart additional fluid capacity with the larger differential cover is worth the cost. That only increases about 22% over the stock. There must be a size/dimensional limitation there that prohibits greater expansion.
Temperature monitoring may be more cost effective. If the fluids get hot, slow down or stop and let them cool down to the safe region.