guys, its easy. use the term "1/4" to describe the rear side window scoops or louvers and "rear" for the ones we are actually chatting about in this thread.
I just saw a set on a Windveil blue GT I liked it, I personally have my rear tinted and like the look but I have to say it really looked good with that color.
I am happy with my set-up on the 1/4 and rear. No problems. We will see how they do as they get some years on them. Visual issues are not a problem with the rear. No slat scoope on the sides. Keeps the leaves and debis out while shading the interior very well. I also shyed away from the metal louver due to heat conductivity. Just my thing.
As for the looks on the mineral grey, it really depends if the overall design of the car is cohesive. The louvers could look bad on a number of colors if there is not enough black on the rest of the car to have it flow. Just my opinion.
Have fun and stay safe.
The screaming yellow pics you have is a buddy over on another board who goes by Winterhawk. He likes the lovers, but said there is not strut to support the window for cleaning.