Well I know Im in the wrong section. 7.3L guy here. But I have both and have had them on my truck for the last 180K. No issues, I felt it was worth the money. Others may say different. Ive never seen the gauge get to the " danger" zone. I replace the trans filter every 15k though. Cheap insurance if you ask me.
So in short 8 years on being on the truck, the transmission filter housing, gauge and branded lines have held up very well. Coolant filter, I ended up replacing some of the hoses from Napa. More heavy duty. Just my 2 cents.