I really like performance of the orange -32 degree Rain-X.
When my grandfather passed, I took several gallons of plain blue -32 degree stuff from his garage, and have been mixing it 50/50 with Rain-X, with no noticeable drop in the water beading or de-icing.
Lately, I have had a problem in my 2008 Dodge Ram, with the "low washer fluid" warning coming on regardless of the actual level. I have had this truck since 2018 and used Rain-X the entire time, but this just started in the past month.
I can only assume that the Rain X has left a film on the sensor, but I like the performance of it, and don't mind the message coming on once in a while. If it were a newer/nicer vehicle, or if I drove the truck every day, I would probably be more annoyed by it.
I live in SE Pennsylvania, we get all 4 seasons here, so I use a decent amount of fluid between pollen, salt, and I usually give it a spray before driving in the rain to give it a fresh "film"